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8 Ebook Discovery Services Compared

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Free and discounted ebooks can be a powerful tool for increasing sales, but only if readers know about the deal.

That’s where ebook discovery services come into play. These mailing lists can put your free or discounted books in front of tens of thousands of interested readers.

We’ve gathered the data on eight popular services so you can compare pricing, audience, and features to find the right platform for promoting your free and discounted books.

  1. The Criteria
  2. The Services
  3. Pricing and Value
  4. Conclusion


The Criteria

To be included in this comparison, a service must:

  • specialize in free or deeply discounted books
  • offer genre-specific pricing
  • maintain a median list size of at least 20,000 readers
  • disclose the number of subscribers for each genre

That last point is of critical importance: without knowing the number of impressions authors can expect their book to receive, there is no way of evaluating whether the service justifies the expense.



The Services

Freebooksy / Bargain Booksy
Logo: Freebooksy ebook discovery serviceLogo: Bargain Booksy ebook discovery service

Freebooksy and Bargain Booksy are sister sites. Freebooksy promotes permanently and temporarily free ebooks to their audience of over 230,000 readers, while Bargain Booksy promotes discounted titles to more than 170,000 subscribers. Deal of the Day features are available to distribute ads to a combined audience of Freebooksy and Bargain Booksy subscribers.

Freebooksy and Bargain Booksy recently lowered some of their fees, giving them a competitive edge in several genres.

Requirements: Books must be free for Freebooksy, and between $0.99 and $5.00 for Bargain Booksy. Professional writing, editing, and cover design are required. Amazon reviews are preferred. Deal of the Day ads must be Kindle Countdown deals or must be priced at $2.99, and must have a minimum of 20 4-star reviews on Amazon.

Strengths and Weaknesses: Attractive mailings with a limited number of books. Notification of acceptance usually happens within two days.

Best Categories: Bargain Booksy’s nonfiction categories are great values, particularly the Cooking, Travel, General Nonfiction, and Self Help categories.

https://www.freebooksy.com
https://www.bargainbooksy.com

BookBub
Logo: BookBub ebook discovery service

BookBub is arguably the best-known service on the market, dominating the ebook discovery landscape with its huge subscriber base. BookBub owes some of this success to a substantial infusion of capital: $3.8 million in funding in 2014, plus another round of $7 million in 2015.

BookBub promotions have limited space and high demand: only 10-15% of BookBub applicants are accepted out of 200-300 submissions daily.

In addition to its genre-based mailings, the site offers distribution to a regional subset of its list, for either US distribution or international distribution (UK, Canada, India, and Australia). These options are available at a reduced price (approximately 82% of full price for US, 24% of full price for international), however, they may also reduce the chances of your promotion being selected.

Requirements: Books must be discounted by at least 50%. Discounts (other than permanently free) must be limited-time offers, and must be the best price available in the last 90 days. Short stories and novellas are not accepted. Eligible books must meet length requirements which vary by the book’s type. Books will not be featured more than once every 6 months.

Strengths and Weaknesses: Massive subscriber base. Best median value for free books; ties with Fussy Librarian for $0.99 books. High demand and stringent quality standards mean low acceptance rates for applicants. BookBub’s wider distribution comes with a high price tag in popular genres, and titles priced higher than $0.99 generally offer a lower return on investment.

Best Categories: Teen & Young Adult, New Adult Romance, Romantic Suspense, Crime Fiction, Action & Adventure.

Unique Categories: True Crime, Supernatural Suspense, Historical Mystery, New Adult Romance.

https://www.bookbub.com

BookSends
Logo: BookSends ebook discovery service

Formerly BookBlast, BookSends operates its own discovery service as well as providing lists to other services like EReaderIQ (profiled below).

BookSends has an unusual pricing model in that ads for $0.99 books are priced lower than ads for free books.

Requirements: Five reviews with a high average, sale price under $3.00, and discounted to at least 50% of full price. Novellas and collections of short stories are unlikely to be accepted as paid books.

Strengths and Weaknesses: Generally good reports of high downloads and sales. BookSends may ask applicants to reschedule rather than rejecting them for scheduling reasons. Authors can use affiliate links on free book promotions. High CPM (second only to EReaderIQ, a BookSends partner).

Best Categories: At the $0.99 price point, Children’s Books, Teen/YA, and Mysteries/Thrillers are BookSends’ best values.

http://booksends.com/

Fussy Librarian
Logo: Fussy Librarian ebook discovery service

Fussy Librarian launched in 2013 with the promise of recommendations tailored to the individual reader. Subscribers can choose from 11 nonfiction and 29 fiction categories; specify their preferred language (English, Spanish, Hindi, Portuguese, German, French, Japanese, Russian, or Italian); and can filter books by their level of profanity, violence, and sexual content.

Fussy Librarian has approximately 121,000 subscribers. Authors can promote their book to a second genre list at half price.

Requirements: Books must be $5.99 or less on the day of the promotion, and must have either 10-19 reviews with a 4.0 rating on Amazon (may be split across multiple stores), or 20+ reviews with a 3.5 rating. Only Amazon reviews are accepted.

Strengths and Weaknesses: Best median value for books priced over $0.99 and over. 50% discount when promoting in a second category. Content filters allow more precise targeting. Most approved books are notified within 24 hours.

Best Categories: Historical Fiction, Literary Fiction, Young Adult, Science Fiction, Mystery.

Unique Categories: Suspense, Mystery – Female Sleuths, Mystery – British Detective.

http://www.thefussylibrarian.com

Robin Reads
Logo: Robin Reads ebook discovery service

Robin Reads lists books which are free or $0.99 and sends out daily email bulletins to approximately 120,000 subscribers. (Although the site does not separate genres in its mailers, it does provide statistics for its readers’ genre preferences. Price comparisons are based on these figures.)

Requirements: Books must be well-formatted ebooks priced at free or $0.99. No minimum length requirement, but full-length books are given priority over shorter works. Professional presentation. No minimum number of reviews required.

Strengths and Weaknesses: Same fee for free and $0.99 books. Comparatively poor CPM on smaller genre lists. Less attractive mailers.

Best Categories: Mystery, Romance, Thriller.

Unique Categories: Dystopia.

http://robinreads.com/

EReaderIQ
Logo: eReaderIQ ebook discovery service

EReaderIQ is an ebook tracking service which allows users to monitor authors, titles, or an Amazon wish list, and to receive notifications when the prices of their items change. They also maintain an ebook discovery service that combines its own lists with partner BookSends’ database to reach more than 150,000 subscribers.

Requirements: Identical to BookSends. Five reviews with a high average, sale price under $3.00, and discounted to at least 50% of full price. Novellas and collections of short stories are unlikely to be accepted as paid books.

Strengths and Weaknesses: Charges less for books at the $0.99 price point. In general, EReaderIQ charges more than its partner BookSends, but the increase in the number of subscribers doesn’t always match the increase in the fee.

Best Categories: Mysteries/Thrillers, Historical, Literary, and Action/Adventure.

http://www.ereaderiq.com/

BookGorilla
Logo: BookGorilla ebook discovery service

BookGorilla’s categories are the most detailed on the market, offering a menu of more than 260 subcategories of fiction and nonfiction to its 350,000-member audience. Subscribers receive ebook listings tailored to their preferences.

Requirements: Books must be priced below $3.99. Books over $1.99 are a minority. Discounted prices are not a requirement. Books with less than a 4-star rating or fewer than 5 reviews on Amazon are likely to be rejected. Book ads may only run once in a 14-day period.

Strengths and Weaknesses: Extensive subcategories allow superior targeting of readers. Some genres offer poor CPM at higher price brackets.

Best Categories: Mystery, Thrillers, Crime Fiction.

Unique Categories: Numerous; BookGorilla’s granular breakdown of categories provides a number of unique subgenres such as Vampire Romance, Steampunk, Arts & Photography, and Fantasy Anthologies.

http://www.bookgorilla.com/



Pricing and Value

For each genre below we have evaluated four price brackets — Free, $0.99, $1.99, and $2.99 or higher. Each tab lists the services from best to worst value, determined by the cost to reach 1,000 subscribers (CPM). The higher on the list an option is, the better its value.

Although most services assign a genre to your book, they may honor requests for a specific genre. Only genres which have comparable categories among two or more services are shown.

Prices, categories, and subscriber counts were gathered on May 24, 2016. Consult the companies’ websites for the most recent details.


Mystery and Thriller

Free Books

Service Category Reach Cost CPM
Fussy Librarian Mysteries 97,421 $ 16.00 $ 0.16
BookGorilla Mysteries 192,500 $ 50.00 $ 0.26
Freebooksy Mystery 157,600 $ 85.00 $ 0.54
Robin Reads Mystery 64,500 $ 40.00 $ 0.62
EReaderIQ Mysteries/Thrillers 98,000 $ 100.00 $ 1.02
Booksends Mysteries/Thrillers 57,500 $ 75.00 $ 1.30

$0.99 Books

Service Category Reach Cost CPM
Fussy Librarian Mysteries 97,421 $ 16.00 $ 0.16
BookGorilla Mysteries 192,500 $ 50.00 $ 0.26
Bargain Booksy Mystery 124,700 $ 50.00 $ 0.40
Robin Reads Mystery 64,500 $ 40.00 $ 0.62
EReaderIQ Mysteries/Thrillers 98,000 $ 80.00 $ 0.82
Booksends Mysteries/Thrillers 57,500 $ 50.00 $ 0.87

$1.99 Books

Service Category Reach Cost CPM
Fussy Librarian Mysteries 97,421 $ 16.00 $ 0.16
Bargain Booksy Mystery 124,700 $ 50.00 $ 0.40
BookGorilla Mysteries 192,500 $ 100.00 $ 0.52
EReaderIQ Mysteries/Thrillers 98,000 $ 120.00 $ 1.22

$2.99 Books

Service Category Reach Cost CPM
Fussy Librarian Mysteries 97,421 $ 16.00 $ 0.16
Bargain Booksy Mystery 124,700 $ 50.00 $ 0.40
BookGorilla Mysteries 192,500 $ 100.00 $ 0.52
EReaderIQ Mysteries/Thrillers 98,000 $ 160.00 $ 1.63

Although Fussy Librarian has a smaller reach, it offers a superior value in the general Mystery category, handily beating competitors across all price brackets.

Free Books

Service Category Reach Cost CPM
BookBub Cozy Mysteries 3,340,000 $ 455.00 $ 0.14
Fussy Librarian Mystery-cozy 44,486 $ 14.00 $ 0.31
Freebooksy Cozy Mystery 155,800 $ 85.00 $ 0.55

$0.99 Books

Service Category Reach Cost CPM
BookBub Cozy Mysteries 3,340,000 $ 910.00 $ 0.27
Fussy Librarian Mystery-cozy 44,486 $ 14.00 $ 0.31
Bargain Booksy Cozy Mystery 123,900 $ 50.00 $ 0.40

$1.99 Books

Service Category Reach Cost CPM
Fussy Librarian Mystery-cozy 44,486 $ 14.00 $ 0.31
Bargain Booksy Cozy Mystery 123,900 $ 50.00 $ 0.40
BookBub Cozy Mysteries 3,340,000 $ 1585.00 $ 0.47

$2.99 Books

Service Category Reach Cost CPM
Fussy Librarian Mystery-cozy 44,486 $ 14.00 $ 0.31
Bargain Booksy Cozy Mystery 123,900 $ 50.00 $ 0.40
BookBub Cozy Mysteries 3,340,000 $ 2275.00 $ 0.68

Free Books

Service Category Reach Cost CPM
BookGorilla Police Procedurals 178,500 $ 50.00 $ 0.28
Fussy Librarian Police procedural 38,685 $ 12.00 $ 0.31

$0.99 Books

Service Category Reach Cost CPM
BookGorilla Police Procedurals 178,500 $ 50.00 $ 0.28
Fussy Librarian Police procedural 38,685 $ 12.00 $ 0.31

$1.99 Books

Service Category Reach Cost CPM
Fussy Librarian Police procedural 38,685 $ 12.00 $ 0.31
BookGorilla Police Procedurals 178,500 $ 100.00 $ 0.56

$2.99 Books

Service Category Reach Cost CPM
Fussy Librarian Police procedural 38,685 $ 12.00 $ 0.31
BookGorilla Police Procedurals 178,500 $ 100.00 $ 0.56

Free Books

Service Category Reach Cost CPM
BookBub Crime Fiction 3,640,000 $ 505.00 $ 0.14
BookGorilla Crime Fiction 185,500 $ 50.00 $ 0.27

$0.99 Books

Service Category Reach Cost CPM
BookBub Crime Fiction 3,640,000 $ 1010.00 $ 0.28
BookGorilla Crime Fiction 185,500 $ 50.00 $ 0.27

$1.99 Books

Service Category Reach Cost CPM
BookBub Crime Fiction 3,640,000 $ 1745.00 $ 0.48
BookGorilla Crime Fiction 185,500 $ 100.00 $ 0.54

$2.99 Books

Service Category Reach Cost CPM
BookGorilla Crime Fiction 185,500 $ 100.00 $ 0.54
BookBub Crime Fiction 3,640,000 $ 2525.00 $ 0.69

BookBub offers the superior value for free Crime Fiction promotions, but low acceptance rates and a steep price tag will put it out of reach of many authors. Although BookGorilla is not a solid value for free books, it matches Bookbub’s value at the $0.99 price point and exceeds it at the $2.99 – $3.99 price range (the highest price BookGorilla will accept).

Free Books

Service Category Reach Cost CPM
BookBub Thrillers 2,760,000 $ 380.00 $ 0.14
Fussy Librarian Thrillers 96,109 $ 16.00 $ 0.17
BookGorilla Thrillers 185,500 $ 50.00 $ 0.27
Freebooksy Thriller 156,500 $ 85.00 $ 0.54
Robin Reads Thriller 49,500 $ 40.00 $ 0.81

$0.99 Books

Service Category Reach Cost CPM
Fussy Librarian Thrillers 96,109 $ 16.00 $ 0.17
BookGorilla Thrillers 185,500 $ 50.00 $ 0.27
BookBub Thrillers 2,760,000 $ 760.00 $ 0.28
Bargain Booksy Thriller 124,200 $ 50.00 $ 0.40
Robin Reads Thriller 49,500 $ 40.00 $ 0.81

$1.99 Books

Service Category Reach Cost CPM
Fussy Librarian Thrillers 96,109 $ 16.00 $ 0.17
Bargain Booksy Thriller 124,200 $ 50.00 $ 0.40
BookBub Thrillers 2,760,000 $ 1300.00 $ 0.47
BookGorilla Thrillers 185,500 $ 100.00 $ 0.54

$2.99 Books

Service Category Reach Cost CPM
Fussy Librarian Thrillers 96,109 $ 16.00 $ 0.17
Bargain Booksy Thriller 124,200 $ 50.00 $ 0.40
BookGorilla Thrillers 185,500 $ 100.00 $ 0.54
BookBub Thrillers 2,760,000 $ 1900.00 $ 0.69

Free Books

Service Category Reach Cost CPM
BookBub Action and Adventure 2,410,000 $ 290.00 $ 0.12
Fussy Librarian Action-adventure 26,072 $ 10.00 $ 0.38
BookGorilla Action and Adventure 112,000 $ 50.00 $ 0.45
EReaderIQ Action/Adventure 59,000 $ 75.00 $ 1.27
Booksends Action/Adventure 35,000 $ 50.00 $ 1.43

$0.99 Books

Service Category Reach Cost CPM
BookBub Action and Adventure 2,410,000 $ 580.00 $ 0.24
Fussy Librarian Action-adventure 26,072 $ 10.00 $ 0.38
BookGorilla Action and Adventure 112,000 $ 50.00 $ 0.45
Booksends Action/Adventure 35,000 $ 40.00 $ 1.14
EReaderIQ Action/Adventure 59,000 $ 70.00 $ 1.19

$1.99 Books

Service Category Reach Cost CPM
Fussy Librarian Action-adventure 26,072 $ 10.00 $ 0.38
BookBub Action and Adventure 2,410,000 $ 1000.00 $ 0.41
BookGorilla Action and Adventure 112,000 $ 100.00 $ 0.89
Booksends Action/Adventure 35,000 $ 60.00 $ 1.71
EReaderIQ Action/Adventure 59,000 $ 105.00 $ 1.78

$2.99 Books

Service Category Reach Cost CPM
Fussy Librarian Action-adventure 26,072 $ 10.00 $ 0.38
BookBub Action and Adventure 2,410,000 $ 1450.00 $ 0.60
BookGorilla Action and Adventure 112,000 $ 100.00 $ 0.89
Booksends Action/Adventure 35,000 $ 80.00 $ 2.29
EReaderIQ Action/Adventure 59,000 $ 140.00 $ 2.37


Speculative Fiction

Free Books

Service Category Reach Cost CPM
Fussy Librarian Science fiction 109,513 $ 16.00 $ 0.15
BookBub Science Fiction 1,790,000 $ 300.00 $ 0.17
BookGorilla All Science Fiction 70,000 $ 40.00 $ 0.57
Freebooksy Science Fiction 65,400 $ 70.00 $ 1.07
Robin Reads SciFi and Fantasy 18,000 $ 25.00 $ 1.39
Booksends Science Fiction 24,000 $ 50.00 $ 2.08
EReaderIQ Science Fiction 29,000 $ 75.00 $ 2.59

$0.99 Books

Service Category Reach Cost CPM
Fussy Librarian Science fiction 109,513 $ 16.00 $ 0.15
BookBub Science Fiction 1,790,000 $ 600.00 $ 0.34
Bargain Booksy Science Fiction 69,400 $ 35.00 $ 0.50
BookGorilla All Science Fiction 70,000 $ 40.00 $ 0.57
Booksends Science Fiction 24,000 $ 25.00 $ 1.04
EReaderIQ Science Fiction 29,000 $ 35.00 $ 1.21
Robin Reads SciFi and Fantasy 18,000 $ 25.00 $ 1.39

$1.99 Books

Service Category Reach Cost CPM
Fussy Librarian Science fiction 109,513 $ 16.00 $ 0.15
Bargain Booksy Science Fiction 69,400 $ 35.00 $ 0.50
BookBub Science Fiction 1,790,000 $ 1030.00 $ 0.58
BookGorilla All Science Fiction 70,000 $ 75.00 $ 1.07
Booksends Science Fiction 24,000 $ 35.00 $ 1.46
EReaderIQ Science Fiction 29,000 $ 50.00 $ 1.72

$2.99 Books

Service Category Reach Cost CPM
Fussy Librarian Science fiction 109,513 $ 16.00 $ 0.15
Bargain Booksy Science Fiction 69,400 $ 35.00 $ 0.50
BookBub Science Fiction 1,790,000 $ 1500.00 $ 0.84
BookGorilla All Science Fiction 70,000 $ 75.00 $ 1.07
Booksends Science Fiction 24,000 $ 50.00 $ 2.08
EReaderIQ Science Fiction 29,000 $ 70.00 $ 2.41

Free Books

Service Category Reach Cost CPM
BookBub Fantasy 1,830,000 $ 270.00 $ 0.15
Fussy Librarian General fantasy 32,168 $ 12.00 $ 0.37
BookGorilla Fantasy 80,500 $ 40.00 $ 0.50
Freebooksy Fantasy / Paranormal 104,500 $ 100.00 $ 0.96
Robin Reads SciFi and Fantasy 18,000 $ 25.00 $ 1.39
Booksends Fantasy 26,000 $ 50.00 $ 1.92
EReaderIQ Fantasy 35,000 $ 75.00 $ 2.14

$0.99 Books

Service Category Reach Cost CPM
BookBub Fantasy 1,830,000 $ 540.00 $ 0.30
Fussy Librarian General fantasy 32,168 $ 12.00 $ 0.37
Bargain Booksy Fantasy / Paranormal 92,400 $ 40.00 $ 0.43
BookGorilla Fantasy 80,500 $ 40.00 $ 0.50
Booksends Fantasy 26,000 $ 25.00 $ 0.96
EReaderIQ Fantasy 35,000 $ 35.00 $ 1.00
Robin Reads SciFi and Fantasy 18,000 $ 25.00 $ 1.39

$1.99 Books

Service Category Reach Cost CPM
Fussy Librarian General fantasy 32,168 $ 12.00 $ 0.37
Bargain Booksy Fantasy / Paranormal 92,400 $ 40.00 $ 0.43
BookBub Fantasy 1,830,000 $ 930.00 $ 0.51
BookGorilla Fantasy 80,500 $ 75.00 $ 0.93
Booksends Fantasy 26,000 $ 35.00 $ 1.35
EReaderIQ Fantasy 35,000 $ 50.00 $ 1.43

$2.99 Books

Service Category Reach Cost CPM
Fussy Librarian General fantasy 32,168 $ 12.00 $ 0.37
Bargain Booksy Fantasy / Paranormal 92,400 $ 40.00 $ 0.43
BookBub Fantasy 1,830,000 $ 1350.00 $ 0.74
BookGorilla Fantasy 80,500 $ 75.00 $ 0.93
Booksends Fantasy 26,000 $ 50.00 $ 1.92
EReaderIQ Fantasy 35,000 $ 70.00 $ 2.00

In addition to the general Fantasy category, BookGorilla and Fussy Librarian offer Epic Fantasy and Urban Fantasy categories which may provide slightly better value.

Free Books

Service Category Reach Cost CPM
Fussy Librarian Fantasy-urban 31,948 $ 12.00 $ 0.38
BookGorilla Fantasy – Urban Fantasy 91,000 $ 40.00 $ 0.44

$0.99 Books

Service Category Reach Cost CPM
Fussy Librarian Fantasy-urban 31,948 $ 12.00 $ 0.38
BookGorilla Fantasy – Urban Fantasy 91,000 $ 40.00 $ 0.44

$1.99 Books

Service Category Reach Cost CPM
Fussy Librarian Fantasy-urban 31,948 $ 12.00 $ 0.38
BookGorilla Fantasy – Urban Fantasy 91,000 $ 75.00 $ 0.82

$2.99 Books

Service Category Reach Cost CPM
Fussy Librarian Fantasy-urban 31,948 $ 12.00 $ 0.38
BookGorilla Fantasy – Urban Fantasy 91,000 $ 75.00 $ 0.82

Free Books

Service Category Reach Cost CPM
Fussy Librarian Fantasy-epic 32,856 $ 12.00 $ 0.37
BookGorilla Fantasy – Epic Fantasy 91,000 $ 40.00 $ 0.44

$0.99 Books

Service Category Reach Cost CPM
Fussy Librarian Fantasy-epic 32,856 $ 12.00 $ 0.37
BookGorilla Fantasy – Epic Fantasy 91,000 $ 40.00 $ 0.44

$1.99 Books

Service Category Reach Cost CPM
Fussy Librarian Fantasy-epic 32,856 $ 12.00 $ 0.37
BookGorilla Fantasy – Epic Fantasy 91,000 $ 75.00 $ 0.82

$2.99 Books

Service Category Reach Cost CPM
Fussy Librarian Fantasy-epic 32,856 $ 12.00 $ 0.37
BookGorilla Fantasy – Epic Fantasy 91,000 $ 75.00 $ 0.82

Free Books

Service Category Reach Cost CPM
BookBub Horror 1,030,000 $ 155.00 $ 0.15
Fussy Librarian Horror 58,620 $ 12.00 $ 0.20
Freebooksy Horror 52,000 $ 40.00 $ 0.77
BookGorilla All Horror 59,500 $ 50.00 $ 0.84
Robin Reads Horror/Dystopia 15,000 $ 20.00 $ 1.33
Booksends Horror 19,500 $ 50.00 $ 2.56
EReaderIQ Horror 22,000 $ 75.00 $ 3.41

$0.99 Books

Service Category Reach Cost CPM
Fussy Librarian Horror 58,620 $ 12.00 $ 0.20
BookBub Horror 1,030,000 $ 310.00 $ 0.30
Bargain Booksy Horror 51,300 $ 25.00 $ 0.49
BookGorilla All Horror 59,500 $ 50.00 $ 0.84
Booksends Horror 19,500 $ 20.00 $ 1.03
Robin Reads Horror/Dystopia 15,000 $ 20.00 $ 1.33
EReaderIQ Horror 22,000 $ 30.00 $ 1.36

$1.99 Books

Service Category Reach Cost CPM
Fussy Librarian Horror 58,620 $ 12.00 $ 0.20
Bargain Booksy Horror 51,300 $ 25.00 $ 0.49
BookBub Horror 1,030,000 $ 535.00 $ 0.52
Booksends Horror 19,500 $ 30.00 $ 1.54
BookGorilla All Horror 59,500 $ 100.00 $ 1.68
EReaderIQ Horror 22,000 $ 45.00 $ 2.05

$2.99 Books

Service Category Reach Cost CPM
Fussy Librarian Horror 58,620 $ 12.00 $ 0.20
Bargain Booksy Horror 51,300 $ 25.00 $ 0.49
BookBub Horror 1,030,000 $ 775.00 $ 0.75
BookGorilla All Horror 59,500 $ 100.00 $ 1.68
Booksends Horror 19,500 $ 40.00 $ 2.05
EReaderIQ Horror 22,000 $ 60.00 $ 2.73


Romance and Erotica

Free Books

Service Category Reach Cost CPM
BookGorilla Romance 101,500 $ 50.00 $ 0.49
Freebooksy Sweet Contemporary Romance 140,600 $ 100.00 $ 0.71
Robin Reads Romance 53,000 $ 40.00 $ 0.75
EReaderIQ Romance 86,000 $ 110.00 $ 1.28
Booksends Romance 44,500 $ 85.00 $ 1.91

$0.99 Books

Service Category Reach Cost CPM
BookGorilla Romance 101,500 $ 50.00 $ 0.49
Bargain Booksy Sweet Contemporary Romance 116,600 $ 70.00 $ 0.60
Robin Reads Romance 53,000 $ 40.00 $ 0.75
EReaderIQ Romance 86,000 $ 90.00 $ 1.05
Booksends Romance 44,500 $ 60.00 $ 1.35

$1.99 Books

Service Category Reach Cost CPM
Bargain Booksy Sweet Contemporary Romance 116,600 $ 70.00 $ 0.60
BookGorilla Romance 101,500 $ 100.00 $ 0.99
EReaderIQ Romance 86,000 $ 135.00 $ 1.57
Booksends Romance 44,500 $ 90.00 $ 2.02

$2.99 Books

Service Category Reach Cost CPM
Bargain Booksy Sweet Contemporary Romance 116,600 $ 70.00 $ 0.60
BookGorilla Romance 101,500 $ 100.00 $ 0.99
EReaderIQ Romance 86,000 $ 180.00 $ 2.09
Booksends Romance 44,500 $ 120.00 $ 2.70

In general Romance, BookGorilla offers a superior value for titles priced at $0.99 and below, while Bargain Booksy tops the $1.99 and over brackets. However, see Contemporary Romance and other subgenres below which may have a better CPM than the general category.

Free Books

Service Category Reach Cost CPM
BookBub New Adult Romance 1,150,000 $ 130.00 $ 0.11
BookBub Contemporary Romance 2,290,000 $ 365.00 $ 0.16
Fussy Librarian Romance-contemporary 95,342 $ 16.00 $ 0.17
BookGorilla Contemporary Romance 126,000 $ 50.00 $ 0.40
Freebooksy Sweet Contemporary Romance 140,600 $ 100.00 $ 0.71
Freebooksy Steamy Contemporary Romance 140,600 $ 100.00 $ 0.71

$0.99 Books

Service Category Reach Cost CPM
Fussy Librarian Romance-contemporary 95,342 $ 16.00 $ 0.17
BookBub New Adult Romance 1,150,000 $ 260.00 $ 0.23
BookBub Contemporary Romance 2,290,000 $ 730.00 $ 0.32
BookGorilla Contemporary Romance 126,000 $ 50.00 $ 0.40
Bargain Booksy Sweet Contemporary Romance 116,600 $ 70.00 $ 0.60
Bargain Booksy Steamy Contemporary Romance 116,600 $ 70.00 $ 0.60

$1.99 Books

Service Category Reach Cost CPM
Fussy Librarian Romance-contemporary 95,342 $ 16.00 $ 0.17
BookBub New Adult Romance 1,150,000 $ 450.00 $ 0.39
BookBub Contemporary Romance 2,290,000 $ 1285.00 $ 0.56
Bargain Booksy Sweet Contemporary Romance 116,600 $ 70.00 $ 0.60
Bargain Booksy Steamy Contemporary Romance 116,600 $ 70.00 $ 0.60
BookGorilla Contemporary Romance 126,000 $ 100.00 $ 0.79

$2.99 Books

Service Category Reach Cost CPM
Fussy Librarian Romance-contemporary 95,342 $ 16.00 $ 0.17
BookBub New Adult Romance 1,150,000 $ 650.00 $ 0.57
Bargain Booksy Sweet Contemporary Romance 116,600 $ 70.00 $ 0.60
Bargain Booksy Steamy Contemporary Romance 116,600 $ 70.00 $ 0.60
BookGorilla Contemporary Romance 126,000 $ 100.00 $ 0.79
BookBub Contemporary Romance 2,290,000 $ 1825.00 $ 0.80

BookBub’s New Adult Romance category is an outstanding value for eligible books.

Free Books

Service Category Reach Cost CPM
BookBub Chick Lit 650,000 $ 105.00 $ 0.16
Fussy Librarian Romance comedy 40,903 $ 14.00 $ 0.34

$0.99 Books

Service Category Reach Cost CPM
BookBub Chick Lit 650,000 $ 210.00 $ 0.32
Fussy Librarian Romance comedy 40,903 $ 14.00 $ 0.34

$1.99 Books

Service Category Reach Cost CPM
Fussy Librarian Romance comedy 40,903 $ 14.00 $ 0.34
BookBub Chick Lit 650,000 $ 355.00 $ 0.55

$2.99 Books

Service Category Reach Cost CPM
Fussy Librarian Romance comedy 40,903 $ 14.00 $ 0.34
BookBub Chick Lit 650,000 $ 525.00 $ 0.81

Free Books

Service Category Reach Cost CPM
BookBub Historical Romance 1,600,000 $ 300.00 $ 0.19
Fussy Librarian Romance-historical 45,960 $ 13.00 $ 0.28
BookGorilla Historical Romance 122,500 $ 50.00 $ 0.41
Freebooksy Historical Romance 140,600 $ 100.00 $ 0.71

$0.99 Books

Service Category Reach Cost CPM
Fussy Librarian Romance-historical 45,960 $ 13.00 $ 0.28
BookBub Historical Romance 1,600,000 $ 600.00 $ 0.38
BookGorilla Historical Romance 122,500 $ 50.00 $ 0.41

$1.99 Books

Service Category Reach Cost CPM
Fussy Librarian Romance-historical 45,960 $ 13.00 $ 0.28
BookBub Historical Romance 1,600,000 $ 1050.00 $ 0.66
BookGorilla Historical Romance 122,500 $ 100.00 $ 0.82

$2.99 Books

Service Category Reach Cost CPM
Fussy Librarian Romance-historical 45,960 $ 13.00 $ 0.28
BookGorilla Historical Romance 122,500 $ 100.00 $ 0.82
BookBub Historical Romance 1,600,000 $ 1500.00 $ 0.94

Free Books

Service Category Reach Cost CPM
Fussy Librarian Romance-western 37,204 $ 12.00 $ 0.32
BookGorilla Romance – Westerns 101,500 $ 50.00 $ 0.49

$0.99 Books

Service Category Reach Cost CPM
Fussy Librarian Romance-western 37,204 $ 12.00 $ 0.32
BookGorilla Romance – Westerns 101,500 $ 50.00 $ 0.49

$1.99 Books

Service Category Reach Cost CPM
Fussy Librarian Romance-western 37,204 $ 12.00 $ 0.32
BookGorilla Romance – Westerns 101,500 $ 100.00 $ 0.99

$2.99 Books

Service Category Reach Cost CPM
Fussy Librarian Romance-western 37,204 $ 12.00 $ 0.32
BookGorilla Romance – Westerns 101,500 $ 100.00 $ 0.99

Free Books

Service Category Reach Cost CPM
BookBub Romantic Suspense 1,600,000 $ 205.00 $ 0.13
Fussy Librarian Romance-suspense 89,502 $ 16.00 $ 0.18
BookGorilla Romantic Suspense 129,500 $ 50.00 $ 0.39
Freebooksy Romantic Suspense 140,600 $ 100.00 $ 0.71

$0.99 Books

Service Category Reach Cost CPM
Fussy Librarian Romance-suspense 89,502 $ 16.00 $ 0.18
BookBub Romantic Suspense 1,600,000 $ 410.00 $ 0.26
BookGorilla Romantic Suspense 129,500 $ 50.00 $ 0.39
Bargain Booksy Romantic Suspense 116,600 $ 70.00 $ 0.60

$1.99 Books

Service Category Reach Cost CPM
Fussy Librarian Romance-suspense 89,502 $ 16.00 $ 0.18
BookBub Romantic Suspense 1,600,000 $ 715.00 $ 0.45
Bargain Booksy Romantic Suspense 116,600 $ 70.00 $ 0.60
BookGorilla Romantic Suspense 129,500 $ 100.00 $ 0.77

$2.99 Books

Service Category Reach Cost CPM
Fussy Librarian Romance-suspense 89,502 $ 16.00 $ 0.18
Bargain Booksy Romantic Suspense 116,600 $ 70.00 $ 0.60
BookBub Romantic Suspense 1,600,000 $ 1025.00 $ 0.64
BookGorilla Romantic Suspense 129,500 $ 100.00 $ 0.77

Free Books

Service Category Reach Cost CPM
BookBub Paranormal Romance 920,000 $ 205.00 $ 0.22
Fussy Librarian Romance-paranormal 39,908 $ 14.00 $ 0.35
BookGorilla Paranormal Romance 119,000 $ 50.00 $ 0.42
Freebooksy Paranormal Romance 140,600 $ 100.00 $ 0.71

$0.99 Books

Service Category Reach Cost CPM
Fussy Librarian Romance-paranormal 39,908 $ 14.00 $ 0.35
BookGorilla Paranormal Romance 119,000 $ 50.00 $ 0.42
BookBub Paranormal Romance 920,000 $ 410.00 $ 0.45
Bargain Booksy Paranormal Romance 116,600 $ 70.00 $ 0.60

$1.99 Books

Service Category Reach Cost CPM
Fussy Librarian Romance-paranormal 39,908 $ 14.00 $ 0.35
Bargain Booksy Paranormal Romance 116,600 $ 70.00 $ 0.60
BookBub Paranormal Romance 920,000 $ 715.00 $ 0.78
BookGorilla Paranormal Romance 119,000 $ 100.00 $ 0.84

$2.99 Books

Service Category Reach Cost CPM
Fussy Librarian Romance-paranormal 39,908 $ 14.00 $ 0.35
Bargain Booksy Paranormal Romance 116,600 $ 70.00 $ 0.60
BookGorilla Paranormal Romance 119,000 $ 100.00 $ 0.84
BookBub Paranormal Romance 920,000 $ 1025.00 $ 1.11

Free Books

Service Category Reach Cost CPM
BookBub Time Travel Romance 200,000 $ 80.00 $ 0.40
BookGorilla Romance – Time Travel 101,500 $ 50.00 $ 0.49

$0.99 Books

Service Category Reach Cost CPM
BookBub Time Travel Romance 200,000 $ 160.00 $ 0.80
BookGorilla Romance – Time Travel 101,500 $ 50.00 $ 0.49

$1.99 Books

Service Category Reach Cost CPM
BookBub Time Travel Romance 200,000 $ 280.00 $ 1.40
BookGorilla Romance – Time Travel 101,500 $ 100.00 $ 0.99

$2.99 Books

Service Category Reach Cost CPM
BookGorilla Romance – Time Travel 101,500 $ 100.00 $ 0.99
BookBub Time Travel Romance 200,000 $ 400.00 $ 2.00

Free Books

Service Category Reach Cost CPM
BookBub Erotic Romance 1,150,000 $ 340.00 $ 0.30
BookBub Dark Romance & Erotica 296,000 $ 90.00 $ 0.30
Fussy Librarian Romance-erotic 40,269 $ 14.00 $ 0.35
BookGorilla All Sex & Erotica 77,000 $ 40.00 $ 0.52
Freebooksy Steamy Contemporary Romance 140,600 $ 100.00 $ 0.71
Freebooksy Erotic Romance 61,900 $ 100.00 $ 1.62
Robin Reads Steamy Romance/Erotic 21,000 $ 40.00 $ 1.90
Booksends Erotic Romance 16,000 $ 75.00 $ 4.69
EReaderIQ Erotic Romance 19,000 $ 100.00 $ 5.26

$0.99 Books

Service Category Reach Cost CPM
Fussy Librarian Romance-erotic 40,269 $ 14.00 $ 0.35
BookGorilla All Sex & Erotica 77,000 $ 40.00 $ 0.52
BookBub Erotic Romance 1,150,000 $ 680.00 $ 0.59
Bargain Booksy Steamy Contemporary Romance 116,600 $ 70.00 $ 0.60
BookBub Dark Romance & Erotica 296,000 $ 180.00 $ 0.61
Bargain Booksy Erotic Romance 46,800 $ 70.00 $ 1.50
Robin Reads Steamy Romance/Erotic 21,000 $ 40.00 $ 1.90
Booksends Erotic Romance 16,000 $ 40.00 $ 2.50
EReaderIQ Erotic Romance 19,000 $ 70.00 $ 3.68

$1.99 Books

Service Category Reach Cost CPM
Fussy Librarian Romance-erotic 40,269 $ 14.00 $ 0.35
Bargain Booksy Steamy Contemporary Romance 116,600 $ 70.00 $ 0.60
BookGorilla All Sex & Erotica 77,000 $ 75.00 $ 0.97
BookBub Erotic Romance 1,150,000 $ 1180.00 $ 1.03
BookBub Dark Romance & Erotica 296,000 $ 310.00 $ 1.05
Bargain Booksy Erotic Romance 46,800 $ 70.00 $ 1.50
Booksends Erotic Romance 16,000 $ 60.00 $ 3.75
EReaderIQ Erotic Romance 19,000 $ 105.00 $ 5.53

$2.99 Books

Service Category Reach Cost CPM
Fussy Librarian Romance-erotic 40,269 $ 14.00 $ 0.35
Bargain Booksy Steamy Contemporary Romance 116,600 $ 70.00 $ 0.60
BookGorilla All Sex & Erotica 77,000 $ 75.00 $ 0.97
BookBub Erotic Romance 1,150,000 $ 1700.00 $ 1.48
Bargain Booksy Erotic Romance 46,800 $ 70.00 $ 1.50
BookBub Dark Romance & Erotica 296,000 $ 450.00 $ 1.52
Booksends Erotic Romance 16,000 $ 80.00 $ 5.00
EReaderIQ Erotic Romance 19,000 $ 140.00 $ 7.37

In the Erotic Romance category, BookSends and its partners disappoint with inflated pricing.


Historical Fiction

Free Books

Service Category Reach Cost CPM
Fussy Librarian Historical fiction 110,974 $ 10.00 $ 0.09
BookBub Historical Fiction 2,180,000 $ 385.00 $ 0.18
BookGorilla All Historical Fiction 115,500 $ 50.00 $ 0.43
EReaderIQ Historical 60,000 $ 75.00 $ 1.25
Booksends Historical 37,500 $ 50.00 $ 1.33

$0.99 Books

Service Category Reach Cost CPM
Fussy Librarian Historical fiction 110,974 $ 10.00 $ 0.09
BookBub Historical Fiction 2,180,000 $ 770.00 $ 0.35
BookGorilla All Historical Fiction 115,500 $ 50.00 $ 0.43
Booksends Historical 37,500 $ 40.00 $ 1.07
EReaderIQ Historical 60,000 $ 70.00 $ 1.17

$1.99 Books

Service Category Reach Cost CPM
Fussy Librarian Historical fiction 110,974 $ 10.00 $ 0.09
BookBub Historical Fiction 2,180,000 $ 1335.00 $ 0.61
BookGorilla All Historical Fiction 115,500 $ 100.00 $ 0.87
Booksends Historical 37,500 $ 60.00 $ 1.60
EReaderIQ Historical 60,000 $ 105.00 $ 1.75

$2.99 Books

Service Category Reach Cost CPM
Fussy Librarian Historical fiction 110,974 $ 10.00 $ 0.09
BookGorilla All Historical Fiction 115,500 $ 100.00 $ 0.87
BookBub Historical Fiction 2,180,000 $ 1925.00 $ 0.88
Booksends Historical 37,500 $ 80.00 $ 2.13
EReaderIQ Historical 60,000 $ 140.00 $ 2.33

Historical Fiction represents Fussy Librarian’s best bargain, and one of the best values across any genre, price, or service.


Literary Fiction

Free Books

Service Category Reach Cost CPM
Fussy Librarian Literary fiction 110,242 $ 15.00 $ 0.14
BookBub Literary Fiction 1,630,000 $ 250.00 $ 0.15
BookGorilla Contemporary Fiction & Literature – Literary Fiction 101,500 $ 40.00 $ 0.39
Freebooksy Literary Fiction 74,500 $ 60.00 $ 0.81
EReaderIQ Literary 38,000 $ 50.00 $ 1.32
Booksends Literary 16,000 $ 25.00 $ 1.56

$0.99 Books

Service Category Reach Cost CPM
Fussy Librarian Literary fiction 110,242 $ 15.00 $ 0.14
BookBub Literary Fiction 1,630,000 $ 500.00 $ 0.31
BookGorilla Contemporary Fiction & Literature – Literary Fiction 101,500 $ 40.00 $ 0.39
Bargain Booksy Literary Fiction 78,800 $ 35.00 $ 0.44
EReaderIQ Literary 38,000 $ 30.00 $ 0.79
Booksends Literary 16,000 $ 20.00 $ 1.25

$1.99 Books

Service Category Reach Cost CPM
Fussy Librarian Literary fiction 110,242 $ 15.00 $ 0.14
Bargain Booksy Literary Fiction 78,800 $ 35.00 $ 0.44
BookBub Literary Fiction 1,630,000 $ 870.00 $ 0.53
BookGorilla Contemporary Fiction & Literature – Literary Fiction 101,500 $ 75.00 $ 0.74
EReaderIQ Literary 38,000 $ 45.00 $ 1.18
Booksends Literary 16,000 $ 30.00 $ 1.88

$2.99 Books

Service Category Reach Cost CPM
Fussy Librarian Literary fiction 110,242 $ 15.00 $ 0.14
Bargain Booksy Literary Fiction 78,800 $ 35.00 $ 0.44
BookGorilla Contemporary Fiction & Literature – Literary Fiction 101,500 $ 75.00 $ 0.74
BookBub Literary Fiction 1,630,000 $ 1.00 $ 0.77
EReaderIQ Literary 38,000 $ 60.00 $ 1.58
Booksends Literary 16,000 $ 40.00 $ 2.50


Memoir and Biography

Free Books

Service Category Reach Cost CPM
BookBub Biographies and Memoirs 2,350,000 $ 385.00 $ 0.16
Fussy Librarian Biography/memoir 80,381 $ 14.00 $ 0.17
BookGorilla Biographies & Memoirs – Memoirs 94,500 $ 40.00 $ 0.42

$0.99 Books

Service Category Reach Cost CPM
Fussy Librarian Biography/memoir 80,381 $ 14.00 $ 0.17
BookBub Biographies and Memoirs 2,350,000 $ 770.00 $ 0.33
BookGorilla Biographies & Memoirs – Memoirs 94,500 $ 40.00 $ 0.42

$1.99 Books

Service Category Reach Cost CPM
Fussy Librarian Biography/memoir 80,381 $ 14.00 $ 0.17
BookBub Biographies and Memoirs 2,350,000 $ 1335.00 $ 0.57
BookGorilla Biographies & Memoirs – Memoirs 94,500 $ 75.00 $ 0.79

$2.99 Books

Service Category Reach Cost CPM
Fussy Librarian Biography/memoir 80,381 $ 14.00 $ 0.17
BookGorilla Biographies & Memoirs – Memoirs 94,500 $ 75.00 $ 0.79
BookBub Biographies and Memoirs 2,350,000 $ 1925.00 $ 0.82


Specific Audience

Free Books

Service Category Reach Cost CPM
Fussy Librarian Women’s fiction 95,932 $ 16.00 $ 0.17
BookBub Chick Lit 650,000 $ 105.00 $ 0.16
BookBub Women’s Fiction 1,750,000 $ 310.00 $ 0.18
BookGorilla Women’s Fiction 108,500 $ 50.00 $ 0.46
Booksends Women’s Fiction 18,000 $ 50.00 $ 2.78
EReaderIQ Women’s Fiction 17,000 $ 75.00 $ 4.41

$0.99 Books

Service Category Reach Cost CPM
Fussy Librarian Women’s fiction 95,932 $ 16.00 $ 0.17
BookBub Chick Lit 650,000 $ 210.00 $ 0.32
BookBub Women’s Fiction 1,750,000 $ 620.00 $ 0.35
BookGorilla Women’s Fiction 108,500 $ 50.00 $ 0.46
Booksends Women’s Fiction 18,000 $ 20.00 $ 1.11
EReaderIQ Women’s Fiction 17,000 $ 30.00 $ 1.76

$1.99 Books

Service Category Reach Cost CPM
Fussy Librarian Women’s fiction 95,932 $ 16.00 $ 0.17
BookBub Chick Lit 650,000 $ 355.00 $ 0.55
BookBub Women’s Fiction 1,750,000 $ 1080.00 $ 0.62
BookGorilla Women’s Fiction 108,500 $ 100.00 $ 0.92
Booksends Women’s Fiction 18,000 $ 30.00 $ 1.67
EReaderIQ Women’s Fiction 17,000 $ 45.00 $ 2.65

$2.99 Books

Service Category Reach Cost CPM
Fussy Librarian Women’s fiction 95,932 $ 16.00 $ 0.17
BookBub Chick Lit 650,000 $ 525.00 $ 0.81
BookBub Women’s Fiction 1,750,000 $ 1550.00 $ 0.89
BookGorilla Women’s Fiction 108,500 $ 100.00 $ 0.92
Booksends Women’s Fiction 18,000 $ 40.00 $ 2.22
EReaderIQ Women’s Fiction 17,000 $ 60.00 $ 3.53

Related categories may be found under the Romance heading.

Free Books

Service Category Reach Cost CPM
BookBub LGBT 235,000 $ 90.00 $ 0.38
Fussy Librarian Gay/lesbian 22,965 $ 10.00 $ 0.44
BookGorilla All LBGT – LGBT Fiction 14,000 $ 40.00 $ 2.86

$0.99 Books

Service Category Reach Cost CPM
Fussy Librarian Gay/lesbian 22,965 $ 10.00 $ 0.44
BookBub LGBT 235,000 $ 180.00 $ 0.77
BookGorilla All LBGT – LGBT Fiction 14,000 $ 40.00 $ 2.86

$1.99 Books

Service Category Reach Cost CPM
Fussy Librarian Gay/lesbian 22,965 $ 10.00 $ 0.44
BookBub LGBT 235,000 $ 310.00 $ 1.32
BookGorilla All LBGT – LGBT Fiction 14,000 $ 75.00 $ 5.36

$2.99 Books

Service Category Reach Cost CPM
Fussy Librarian Gay/lesbian 22,965 $ 10.00 $ 0.44
BookBub LGBT 235,000 $ 450.00 $ 1.91
BookGorilla All LBGT – LGBT Fiction 14,000 $ 75.00 $ 5.36

Free Books

Service Category Reach Cost CPM
BookBub African American Interest 340,000 $ 65.00 $ 0.19
Fussy Librarian African-American / multicultural 23,399 $ 10.00 $ 0.43

$0.99 Books

Service Category Reach Cost CPM
BookBub African American Interest 340,000 $ 130.00 $ 0.38
Fussy Librarian African-American / multicultural 23,399 $ 10.00 $ 0.43

$1.99 Books

Service Category Reach Cost CPM
Fussy Librarian African-American / multicultural 23,399 $ 10.00 $ 0.43
BookBub African American Interest 340,000 $ 225.00 $ 0.66

$2.99 Books

Service Category Reach Cost CPM
Fussy Librarian African-American / multicultural 23,399 $ 10.00 $ 0.43
BookBub African American Interest 340,000 $ 325.00 $ 0.96

Free Books

Service Category Reach Cost CPM
BookBub Children’s 620,000 $ 80.00 $ 0.13
Fussy Librarian Children/middle grade 51,400 $ 10.00 $ 0.19
BookGorilla All Children’s Lit – 4-8 Children 45,500 $ 40.00 $ 0.88
BookGorilla All Children’s Lit – 9-12 Pre-Teen 45,500 $ 40.00 $ 0.88
Freebooksy Children 31,900 $ 40.00 $ 1.25
Booksends Children’s Books 16,500 $ 25.00 $ 1.52
EReaderIQ Children’s Books 20,000 $ 50.00 $ 2.50

$0.99 Books

Service Category Reach Cost CPM
Fussy Librarian Children/middle grade 51,400 $ 10.00 $ 0.19
BookBub Children’s 620,000 $ 160.00 $ 0.26
Bargain Booksy Children 44,800 $ 25.00 $ 0.56
Booksends Children’s Books 16,500 $ 10.00 $ 0.61
BookGorilla All Children’s Lit – 4-8 Children 45,500 $ 40.00 $ 0.88
BookGorilla All Children’s Lit – 9-12 Pre-Teen 45,500 $ 40.00 $ 0.88
EReaderIQ Children’s Books 20,000 $ 20.00 $ 1.00

$1.99 Books

Service Category Reach Cost CPM
Fussy Librarian Children/middle grade 51,400 $ 10.00 $ 0.19
BookBub Children’s 620,000 $ 270.00 $ 0.44
Bargain Booksy Children 44,800 $ 25.00 $ 0.56
Booksends Children’s Books 16,500 $ 15.00 $ 0.91
EReaderIQ Children’s Books 20,000 $ 30.00 $ 1.50
BookGorilla All Children’s Lit – 4-8 Children 45,500 $ 75.00 $ 1.65
BookGorilla All Children’s Lit – 9-12 Pre-Teen 45,500 $ 75.00 $ 1.65

$2.99 Books

Service Category Reach Cost CPM
Fussy Librarian Children/middle grade 51,400 $ 10.00 $ 0.19
Bargain Booksy Children 44,800 $ 25.00 $ 0.56
BookBub Children’s 620,000 $ 400.00 $ 0.65
Booksends Children’s Books 16,500 $ 20.00 $ 1.21
BookGorilla All Children’s Lit – 4-8 Children 45,500 $ 75.00 $ 1.65
BookGorilla All Children’s Lit – 9-12 Pre-Teen 45,500 $ 75.00 $ 1.65
EReaderIQ Children’s Books 20,000 $ 40.00 $ 2.00

Free Books

Service Category Reach Cost CPM
BookBub Teen and Young Adult 1,500,000 $ 115.00 $ 0.08
Fussy Librarian Young adult 108,889 $ 16.00 $ 0.15
BookGorilla All Teen Lit 49,000 $ 40.00 $ 0.82
Freebooksy Young Adult 63,700 $ 75.00 $ 1.18
Booksends Teen/YA 21,500 $ 50.00 $ 2.33
EReaderIQ Teen/YA 22,000 $ 75.00 $ 3.41

$0.99 Books

Service Category Reach Cost CPM
BookBub Teen and Young Adult 1,500,000 $ 230.00 $ 0.15
Fussy Librarian Young adult 108,889 $ 16.00 $ 0.15
Bargain Booksy Young Adult 65,400 $ 25.00 $ 0.38
BookGorilla All Teen Lit 49,000 $ 40.00 $ 0.82
Booksends Teen/YA 21,500 $ 20.00 $ 0.93
EReaderIQ Teen/YA 22,000 $ 30.00 $ 1.36

$1.99 Books

Service Category Reach Cost CPM
Fussy Librarian Young adult 108,889 $ 16.00 $ 0.15
BookBub Teen and Young Adult 1,500,000 $ 395.00 $ 0.26
Bargain Booksy Young Adult 65,400 $ 25.00 $ 0.38
Booksends Teen/YA 21,500 $ 30.00 $ 1.40
BookGorilla All Teen Lit 49,000 $ 75.00 $ 1.53
EReaderIQ Teen/YA 22,000 $ 45.00 $ 2.05

$2.99 Books

Service Category Reach Cost CPM
Fussy Librarian Young adult 108,889 $ 16.00 $ 0.15
BookBub Teen and Young Adult 1,500,000 $ 575.00 $ 0.38
Bargain Booksy Young Adult 65,400 $ 25.00 $ 0.38
BookGorilla All Teen Lit 49,000 $ 75.00 $ 1.53
Booksends Teen/YA 21,500 $ 40.00 $ 1.86
EReaderIQ Teen/YA 22,000 $ 60.00 $ 2.73

BookBub’s Teen and Young Adult category provides the best bargain for promoting free ebooks.


Humor

Free Books

Service Category Reach Cost CPM
BookBub Humor 500,000 $ 90.00 $ 0.18
Fussy Librarian Humor 56,028 $ 12.00 $ 0.21
BookGorilla Humor 91,000 $ 40.00 $ 0.44

$0.99 Books

Service Category Reach Cost CPM
Fussy Librarian Humor 56,028 $ 12.00 $ 0.21
BookBub Humor 500,000 $ 180.00 $ 0.36
BookGorilla Humor 91,000 $ 40.00 $ 0.44

$1.99 Books

Service Category Reach Cost CPM
Fussy Librarian Humor 56,028 $ 12.00 $ 0.21
BookBub Humor 500,000 $ 310.00 $ 0.62
BookGorilla Humor 91,000 $ 75.00 $ 0.82

$2.99 Books

Service Category Reach Cost CPM
Fussy Librarian Humor 56,028 $ 12.00 $ 0.21
BookGorilla Humor 91,000 $ 75.00 $ 0.82
BookBub Humor 500,000 $ 450.00 $ 0.90


Religious and Spiritual

Free Books

Service Category Reach Cost CPM
Fussy Librarian Religious fiction 57,299 $ 10.00 $ 0.17
BookBub Religious and Inspirational 1,290,000 $ 280.00 $ 0.22
Fussy Librarian Inspirational/devotional 23,378 $ 10.00 $ 0.43
BookGorilla All Advice and How-To – Spiritual 56,000 $ 40.00 $ 0.71
BookGorilla All Religious Fiction 52,500 $ 50.00 $ 0.95
Freebooksy Religion / Spirituality 57,200 $ 75.00 $ 1.31
Booksends Christian/Religious Fiction 11,500 $ 25.00 $ 2.17
EReaderIQ Christian/Religious Fiction 21,000 $ 50.00 $ 2.38

$0.99 Books

Service Category Reach Cost CPM
Fussy Librarian Religious fiction 57,299 $ 10.00 $ 0.17
BookBub Religious and Inspirational 1,290,000 $ 560.00 $ 0.43
Bargain Booksy Religion / Spirituality 58,400 $ 25.00 $ 0.43
Fussy Librarian Inspirational/devotional 23,378 $ 10.00 $ 0.43
BookGorilla All Advice and How-To – Spiritual 56,000 $ 40.00 $ 0.71
BookGorilla All Religious Fiction 52,500 $ 50.00 $ 0.95
Booksends Christian/Religious Fiction 11,500 $ 15.00 $ 1.30
EReaderIQ Christian/Religious Fiction 21,000 $ 25.00 $ 1.19

$1.99 Books

Service Category Reach Cost CPM
Fussy Librarian Religious fiction 57,299 $ 10.00 $ 0.17
Bargain Booksy Religion / Spirituality 58,400 $ 25.00 $ 0.43
Fussy Librarian Inspirational/devotional 23,378 $ 10.00 $ 0.43
BookBub Religious and Inspirational 1,290,000 $ 980.00 $ 0.76
BookGorilla All Advice and How-To – Spiritual 56,000 $ 75.00 $ 1.34
BookGorilla All Religious Fiction 52,500 $ 75.00 $ 1.43
EReaderIQ Christian/Religious Fiction 21,000 $ 35.00 $ 1.67
Booksends Christian/Religious Fiction 11,500 $ 20.00 $ 1.74

$2.99 Books

Service Category Reach Cost CPM
Fussy Librarian Religious fiction 57,299 $ 10.00 $ 0.17
Bargain Booksy Religion / Spirituality 58,400 $ 25.00 $ 0.43
Fussy Librarian Inspirational/devotional 23,378 $ 10.00 $ 0.43
BookBub Religious and Inspirational 1,290,000 $ 1400.00 $ 1.09
BookGorilla All Advice and How-To – Spiritual 56,000 $ 75.00 $ 1.34
BookGorilla All Religious Fiction 52,500 $ 75.00 $ 1.43
EReaderIQ Christian/Religious Fiction 21,000 $ 50.00 $ 2.38
Booksends Christian/Religious Fiction 11,500 $ 30.00 $ 2.61

Free Books

Service Category Reach Cost CPM
BookBub Christian Fiction 920,000 $ 210.00 $ 0.23
BookGorilla All Religious Fiction – Christian 52,500 $ 50.00 $ 0.95
Booksends Christian/Religious Fiction 11,500 $ 25.00 $ 2.17
EReaderIQ Christian/Religious Fiction 21,000 $ 50.00 $ 2.38

$0.99 Books

Service Category Reach Cost CPM
BookBub Christian Fiction 920,000 $ 420.00 $ 0.46
BookGorilla All Religious Fiction – Christian 52,500 $ 50.00 $ 0.95
EReaderIQ Christian/Religious Fiction 21,000 $ 25.00 $ 1.19
Booksends Christian/Religious Fiction 11,500 $ 15.00 $ 1.30

$1.99 Books

Service Category Reach Cost CPM
BookBub Christian Fiction 920,000 $ 740.00 $ 0.80
BookGorilla All Religious Fiction – Christian 52,500 $ 75.00 $ 1.43
EReaderIQ Christian/Religious Fiction 21,000 $ 35.00 $ 1.67
Booksends Christian/Religious Fiction 11,500 $ 20.00 $ 1.74

$2.99 Books

Service Category Reach Cost CPM
BookBub Christian Fiction 920,000 $ 1050.00 $ 1.14
BookGorilla All Religious Fiction – Christian 52,500 $ 75.00 $ 1.43
EReaderIQ Christian/Religious Fiction 21,000 $ 50.00 $ 2.38
Booksends Christian/Religious Fiction 11,500 $ 30.00 $ 2.61


Nonfiction

Free Books

Service Category Reach Cost CPM
BookBub General Nonfiction 1,550,000 $ 265.00 $ 0.17
Fussy Librarian General nonfiction 22,512 $ 10.00 $ 0.44
BookGorilla All Nonfiction 70,000 $ 40.00 $ 0.57
Freebooksy General Nonfiction 78,100 $ 75.00 $ 0.96
Robin Reads Nonfiction 34,000 $ 40.00 $ 1.18
EReaderIQ Nonfiction 52,000 $ 100.00 $ 1.92
Booksends Nonfiction 30,500 $ 75.00 $ 2.46

$0.99 Books

Service Category Reach Cost CPM
Bargain Booksy General Nonfiction 78,400 $ 25.00 $ 0.32
BookBub General Nonfiction 1,550,000 $ 530.00 $ 0.34
Fussy Librarian General nonfiction 22,512 $ 10.00 $ 0.44
BookGorilla All Nonfiction 70,000 $ 40.00 $ 0.57
Robin Reads Nonfiction 34,000 $ 40.00 $ 1.18
Booksends Nonfiction 30,500 $ 40.00 $ 1.31
EReaderIQ Nonfiction 52,000 $ 70.00 $ 1.35

$1.99 Books

Service Category Reach Cost CPM
Bargain Booksy General Nonfiction 78,400 $ 25.00 $ 0.32
Fussy Librarian General nonfiction 22,512 $ 10.00 $ 0.44
BookBub General Nonfiction 1,550,000 $ 915.00 $ 0.59
BookGorilla All Nonfiction 70,000 $ 75.00 $ 1.07
Booksends Nonfiction 30,500 $ 60.00 $ 1.97
EReaderIQ Nonfiction 52,000 $ 105.00 $ 2.02

$2.99 Books

Service Category Reach Cost CPM
Bargain Booksy General Nonfiction 78,400 $ 25.00 $ 0.32
Fussy Librarian General nonfiction 22,512 $ 10.00 $ 0.44
BookBub General Nonfiction 1,550,000 $ 1325.00 $ 0.85
BookGorilla All Nonfiction 70,000 $ 75.00 $ 1.07
Booksends Nonfiction 30,500 $ 80.00 $ 2.62
EReaderIQ Nonfiction 52,000 $ 140.00 $ 2.69

Bargain Booksy takes the prize for General Nonfiction at prices of $0.99 and above.

Free Books

Service Category Reach Cost CPM
BookBub Cooking 1,630,000 $ 370.00 $ 0.23
Fussy Librarian Cooking and food 25,689 $ 10.00 $ 0.39
BookGorilla All Cookbooks, Food & Wine – Quick & Easy Cooking 91,000 $ 40.00 $ 0.44
Freebooksy Cookbooks and Nutrition 77,100 $ 75.00 $ 0.97

$0.99 Books

Service Category Reach Cost CPM
Bargain Booksy Cookbooks and Nutrition 77,800 $ 25.00 $ 0.32
Fussy Librarian Cooking and food 25,689 $ 10.00 $ 0.39
BookGorilla All Cookbooks, Food & Wine – Quick & Easy Cooking 91,000 $ 40.00 $ 0.44
BookBub Cooking 1,630,000 $ 740.00 $ 0.45

$1.99 Books

Service Category Reach Cost CPM
Bargain Booksy Cookbooks and Nutrition 77,800 $ 25.00 $ 0.32
Fussy Librarian Cooking and food 25,689 $ 10.00 $ 0.39
BookBub Cooking 1,630,000 $ 1290.00 $ 0.79
BookGorilla All Cookbooks, Food & Wine – Quick & Easy Cooking 91,000 $ 75.00 $ 0.82

$2.99 Books

Service Category Reach Cost CPM
Bargain Booksy Cookbooks and Nutrition 77,800 $ 25.00 $ 0.32
Fussy Librarian Cooking and food 25,689 $ 10.00 $ 0.39
BookGorilla All Cookbooks, Food & Wine – Quick & Easy Cooking 91,000 $ 75.00 $ 0.82
BookBub Cooking 1,630,000 $ 1850.00 $ 1.13

Bargain Booksy takes the prize again for paid books in Cooking, edging out Fussy Librarian.

Free Books

Service Category Reach Cost CPM
Fussy Librarian Health and diet 23,421 $ 10.00 $ 0.43
BookGorilla All Advice and How-To – Health, Fitness & Dieting 70,000 $ 40.00 $ 0.57

$0.99 Books

Service Category Reach Cost CPM
Fussy Librarian Health and diet 23,421 $ 10.00 $ 0.43
BookGorilla All Advice and How-To – Health, Fitness & Dieting 70,000 $ 40.00 $ 0.57

$1.99 Books

Service Category Reach Cost CPM
Fussy Librarian Health and diet 23,421 $ 10.00 $ 0.43
BookGorilla All Advice and How-To – Health, Fitness & Dieting 70,000 $ 75.00 $ 1.07

$2.99 Books

Service Category Reach Cost CPM
Fussy Librarian Health and diet 23,421 $ 10.00 $ 0.43
BookGorilla All Advice and How-To – Health, Fitness & Dieting 70,000 $ 75.00 $ 1.07

Free Books

Service Category Reach Cost CPM
BookGorilla All Nonfiction – Travel 77,000 $ 40.00 $ 0.52
Freebooksy Travel 61,100 $ 40.00 $ 0.65

$0.99 Books

Service Category Reach Cost CPM
Bargain Booksy Travel 61,131 $ 25.00 $ 0.41
BookGorilla All Nonfiction – Travel 77,000 $ 40.00 $ 0.52

$1.99 Books

Service Category Reach Cost CPM
Bargain Booksy Travel 61,131 $ 25.00 $ 0.41
BookGorilla All Nonfiction – Travel 77,000 $ 75.00 $ 0.97

$2.99 Books

Service Category Reach Cost CPM
Bargain Booksy Travel 61,131 $ 25.00 $ 0.41
BookGorilla All Nonfiction – Travel 77,000 $ 75.00 $ 0.97

Travel is another of Bargain Booksy’s strengths.

Free Books

Service Category Reach Cost CPM
BookBub Advice and How-To 1,420,000 $ 315.00 $ 0.22
Fussy Librarian How-to 23,907 $ 10.00 $ 0.42
BookGorilla All Advice and How-To 56,000 $ 40.00 $ 0.71
Freebooksy Self Help and How To 76,100 $ 60.00 $ 0.79

$0.99 Books

Service Category Reach Cost CPM
Bargain Booksy Self Help and How To 77,300 $ 25.00 $ 0.32
Fussy Librarian How-to 23,907 $ 10.00 $ 0.42
BookBub Advice and How-To 1,420,000 $ 630.00 $ 0.44
BookGorilla All Advice and How-To 56,000 $ 40.00 $ 0.71

$1.99 Books

Service Category Reach Cost CPM
Bargain Booksy Self Help and How To 77,300 $ 25.00 $ 0.32
Fussy Librarian How-to 23,907 $ 10.00 $ 0.42
BookBub Advice and How-To 1,420,000 $ 1085.00 $ 0.76
BookGorilla All Advice and How-To 56,000 $ 75.00 $ 1.34

$2.99 Books

Service Category Reach Cost CPM
Bargain Booksy Self Help and How To 77,300 $ 25.00 $ 0.32
Fussy Librarian How-to 23,907 $ 10.00 $ 0.42
BookBub Advice and How-To 1,420,000 $ 1575.00 $ 1.11
BookGorilla All Advice and How-To 56,000 $ 75.00 $ 1.34

Once again, Bargain Booksy shows its dominance in nonfiction categories, while Freebooksy falls far short of its paid sibling’s performance.

Free Books

Service Category Reach Cost CPM
BookBub Business 440,000 $ 125.00 $ 0.28
Fussy Librarian Business 21,017 $ 10.00 $ 0.48
BookGorilla All Nonfiction – Business & Investing 70,000 $ 40.00 $ 0.57

$0.99 Books

Service Category Reach Cost CPM
Fussy Librarian Business 21,017 $ 10.00 $ 0.48
BookBub Business 440,000 $ 250.00 $ 0.57
BookGorilla All Nonfiction – Business & Investing 70,000 $ 40.00 $ 0.57

$1.99 Books

Service Category Reach Cost CPM
Fussy Librarian Business 21,017 $ 10.00 $ 0.48
BookBub Business 440,000 $ 425.00 $ 0.97
BookGorilla All Nonfiction – Business & Investing 70,000 $ 75.00 $ 1.07

$2.99 Books

Service Category Reach Cost CPM
Fussy Librarian Business 21,017 $ 10.00 $ 0.48
BookGorilla All Nonfiction – Business & Investing 70,000 $ 75.00 $ 1.07
BookBub Business 440,000 $ 625.00 $ 1.42

Free Books

Service Category Reach Cost CPM
BookBub Parenting 370,000 $ 90.00 $ 0.24
BookGorilla All Nonfiction – Parenting & Relationships 70,000 $ 40.00 $ 0.57

$0.99 Books

Service Category Reach Cost CPM
BookBub Parenting 370,000 $ 180.00 $ 0.49
BookGorilla All Nonfiction – Parenting & Relationships 70,000 $ 40.00 $ 0.57

$1.99 Books

Service Category Reach Cost CPM
BookBub Parenting 370,000 $ 300.00 $ 0.81
BookGorilla All Nonfiction – Parenting & Relationships 70,000 $ 75.00 $ 1.07

$2.99 Books

Service Category Reach Cost CPM
BookGorilla All Nonfiction – Parenting & Relationships 70,000 $ 75.00 $ 1.07
BookBub Parenting 370,000 $ 450.00 $ 1.22

Free Books

Service Category Reach Cost CPM
Fussy Librarian Science 22,193 $ 10.00 $ 0.45
BookGorilla All Nonfiction – Science 77,000 $ 40.00 $ 0.52

$0.99 Books

Service Category Reach Cost CPM
Fussy Librarian Science 22,193 $ 10.00 $ 0.45
BookGorilla All Nonfiction – Science 77,000 $ 40.00 $ 0.52

$1.99 Books

Service Category Reach Cost CPM
Fussy Librarian Science 22,193 $ 10.00 $ 0.45
BookGorilla All Nonfiction – Science 77,000 $ 75.00 $ 0.97

$2.99 Books

Service Category Reach Cost CPM
Fussy Librarian Science 22,193 $ 10.00 $ 0.45
BookGorilla All Nonfiction – Science 77,000 $ 75.00 $ 0.97

Free Books

Service Category Reach Cost CPM
Fussy Librarian Tech 21,265 $ 10.00 $ 0.47
BookGorilla All Nonfiction – Computers & Technology 77,000 $ 40.00 $ 0.52

$0.99 Books

Service Category Reach Cost CPM
Fussy Librarian Tech 21,265 $ 10.00 $ 0.47
BookGorilla All Nonfiction – Computers & Technology 77,000 $ 40.00 $ 0.52

$1.99 Books

Service Category Reach Cost CPM
Fussy Librarian Tech 21,265 $ 10.00 $ 0.47
BookGorilla All Nonfiction – Computers & Technology 77,000 $ 75.00 $ 0.97

$2.99 Books

Service Category Reach Cost CPM
Fussy Librarian Tech 21,265 $ 10.00 $ 0.47
BookGorilla All Nonfiction – Computers & Technology 77,000 $ 75.00 $ 0.97

Free Books

Service Category Reach Cost CPM
Fussy Librarian Sports 20,056 $ 10.00 $ 0.50
BookGorilla All Sports & Outdoors 14,000 $ 40.00 $ 2.86

$0.99 Books

Service Category Reach Cost CPM
Fussy Librarian Sports 20,056 $ 10.00 $ 0.50
BookGorilla All Sports & Outdoors 14,000 $ 40.00 $ 2.86

$1.99 Books

Service Category Reach Cost CPM
Fussy Librarian Sports 20,056 $ 10.00 $ 0.50
BookGorilla All Sports & Outdoors 14,000 $ 75.00 $ 5.36

$2.99 Books

Service Category Reach Cost CPM
Fussy Librarian Sports 20,056 $ 10.00 $ 0.50
BookGorilla All Sports & Outdoors 14,000 $ 75.00 $ 5.36

Fussy Librarian is the clear winner in this category, as Book Gorilla weighs in at 5 to 10 times the cost of Fussy Librarian’s CPM.

Free Books

Service Category Reach Cost CPM
BookBub History 1,620,000 $ 265.00 $ 0.16
Fussy Librarian History 24,721 $ 10.00 $ 0.40
BookGorilla All Nonfiction – History 70,000 $ 40.00 $ 0.57

$0.99 Books

Service Category Reach Cost CPM
BookBub History 1,620,000 $ 530.00 $ 0.33
Fussy Librarian History 24,721 $ 10.00 $ 0.40
BookGorilla All Nonfiction – History 70,000 $ 40.00 $ 0.57

$1.99 Books

Service Category Reach Cost CPM
Fussy Librarian History 24,721 $ 10.00 $ 0.40
BookBub History 1,620,000 $ 915.00 $ 0.56
BookGorilla All Nonfiction – History 70,000 $ 75.00 $ 1.07

$2.99 Books

Service Category Reach Cost CPM
Fussy Librarian History 24,721 $ 10.00 $ 0.40
BookBub History 1,620,000 $ 1325.00 $ 0.82
BookGorilla All Nonfiction – History 70,000 $ 75.00 $ 1.07




Conclusion

For free books, BookBub remains the gold standard for ebook discovery services. Its gargantuan membership places it in a weight class of its own, and it is arguably the most popular of the services in our roster. That popularity also makes it one of the most difficult service to enter; high demand and increasing interest from traditional publishers leads to heavy competition for relatively few slots. But if the steep price tag is within your means and you can secure a spot in their schedule, BookBub offers a solid return on your investment.

For paid books (particular books priced at $2.99 and over), the clear champion is The Fussy Librarian. Fussy Librarian has a much smaller membership, but its correspondingly lower fees do not vary with the price of the book. With superior CPM for higher-priced books and the best CPM across nearly every fiction category, Fussy Librarian presents an outstanding value for a surprisingly low price.

Bargain Booksy ranks moderately well in fiction genres, particularly in the higher price brackets. However, Bargain Booksy really shines in nonfiction categories, where it sits at the top of most rankings. Freebooksy does not fare quite as well as its sister site, generally resting in the lower half of its genres. The popular categories of Mystery, Cozy Mystery, and Thrillers are a notable exception.

Book Gorilla performs erratically overall, offering moderate value in most categories, and bafflingly uncompetitive pricing in others. Book Gorilla is a good investment in categories like Mystery and Thriller, but compare pricing and consider alternative subgenres to obtain the best value.

Robin Reads represents fair-to-poor value in its categories, with the median cost per thousand impressions weighing in at over $1.00. Robin Reads’ best category is Mystery, placing 4th out of the 6 companies represented in that genre.

BookSends / EReaderIQ are listed jointly here, as their shared membership and uniformly high price consistently place last in the rankings — sometimes with a CPM as much as 10 times higher than the closest competitor. Without exception, there are more cost-effective options for promoting your books.


Over To You

Which of these companies have you used to promote your books? What other ebook discovery services have you had success with? Let us know in the comments below.

Related Posts

Which ebook discovery services offer the best value for an #IndieAuthor? — @JohnDoppler Click To Tweet

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37 Responses to 8 Ebook Discovery Services Compared

  1. Freda July 10, 2017 at 3:27 am #

    Robin Reads 120,000?… why does their facebook ad today July 9 2017 say “Join 60,000 readers who read FREE Best Sellers each day”. Are the numbers above including facebook likes and twitter followers?

  2. Renee Rose January 14, 2017 at 2:38 am #

    Totally agree with all of this, but it’s nice to see a formal study that backs up my experience. Thanks so much for putting it together!

  3. Kelli McCracken August 11, 2016 at 12:56 pm #

    John, thank you for putting in the work to help authors learn more about the promotions sites we use. I find this information valuable and will be taking it into consideration when I schedule my next promotion. Again, thank you.

  4. Curtis W. Jackson August 3, 2016 at 2:59 pm #

    Thank you sir, this is a well-prepared and helpful article, especially for struggling writers of independent press. I will share it my brother who is who is working on his first book, and give the link to others.

  5. Christine July 14, 2016 at 2:03 pm #

    Wow, John. I’m blown away from the work you put into this. Thank you so much! Learned a lot from this and also from replies. I will definitely share on my writer’s blog. Only thing I need is a definition of CPM. Thanks!
    Christine

    • Ron Yarosh February 2, 2017 at 3:24 am #

      Cost per thousand (CPM) is a marketing term used to denote the price of 1,000 advertisement impressions on one webpage. If a website publisher charges $2.00 CPM, that means an advertiser must pay $2.00 for every 1,000 impressions of its ad. The “M” in CPM represents the Roman numeral for 1,000.

  6. Roberta Kagan July 8, 2016 at 10:15 pm #

    HI John,
    Thank you so much for sharing all of this valuable information. It will be very helpful for so many authors, myself included.

  7. BookSends July 5, 2016 at 8:50 pm #

    Hi John, thanks for taking the time and effort to assemble your list. I think there might be a couple of things you would be interested to know or that you’re not properly considering when evaluating our site. First of all, BookSends and EreaderIQ do not have any reader overlap. Unlike most other sites, we regularly prune our lists so that we’re giving authors a strong representation of our *active* subscribership. After all, subscribers who never open emails are worthless to authors. The entire concept of eCPM is a poor metric for authors to use in this regard. What matters is how many people actually open an email and take action on books, not how many people signed up for a list, clicked Spam 6 months ago, and are still being presented to authors as viable targets of the mailings. If I had a list of just 100 readers who would buy one book every day at $2.99, charging $75 for that list might have a horrible eCPM but I’m pretty sure every author would feel it was worthwhile. At BookSends, we try to give authors a better idea of how many readers their book will actually be exposed to. Thanks!

    • BookSends July 5, 2016 at 9:01 pm #

      The ability for authors to use affiliate codes (in a way compliant with Amazon TOS as all clicks are routed through websites) also deserves much more attention. We see authors earn over $200 from just one inclusion of their affiliate code in an ad, and many see at least half the ad cost back from affiliate earnings, if not the entire thing. That’s why authors earn more from free promotions with us than any other site. We think outside the box when it comes to increasing returns for authors, and we’re glad so many appreciate that and keep coming back and back.

  8. ferris robinson June 27, 2016 at 6:30 pm #

    John, This is so helpful and informative! My novel (women’s fiction) will be released next week through Kindle Press and I am headed over to the Fussy Librarian! Thank you for taking the time to compile all this info and share it so generously!

  9. Jackie Weger June 9, 2016 at 6:33 pm #

    Thank you, John Doppler. I loved the stats you provided. One item I’d refer to is BookSends allowing authors to use their affiliate codes on their books. And now on both free and priced units. But Amazon told me last week in an online chat that using affiliate codes on any book in a newsletter/email promo is against their TOS. As for all of the other data, I’ve always had an ROI on Bookbub promotions. I often have not seen the ROI I’d anticipated on the other seven. Now, because of your brilliant deductions, I know why. Sweet romance is not among many promoter’s top tier audience today–very good data to keep in mind when stacking promotions. I’m also curious why Michael Gallagher’s fkbt did not make your list for comparison.

    • John Doppler June 27, 2016 at 11:33 am #

      Thank you, Jackie!

      It is against Amazon’s terms to use an affiliate code directly in an email (or any form that’s not attributable to a website, such as shortlinks, QR codes, and printed material like bookmarks or flyers).

      However, it is legal to provide a link to a website, and from there, redirect the user to the Amazon page with an affiliate code. This is the technique BookBub now uses to get around the prohibition on emailed links.

      That rule has tripped up a number of email-based services this year.

      Regarding Free Kindle Book and Tips, Michael let me know that they don’t track stats for individual genres, so there wasn’t a basis for a fair comparison in this case.

  10. Mary Maddox June 5, 2016 at 3:44 pm #

    Thank you for a very useful post. My experience with Robin Reads has been more positive than yours. I sell enough books to break even and sometimes more. I can’t say the same for Bargain Booksy.

    • John Doppler June 27, 2016 at 11:25 am #

      Thanks for the info, Mary! Every promotion is different, so personal experience can be a valuable tool in gauging these services.

  11. Laurence OBryan June 4, 2016 at 6:58 am #

    John,

    This list is useful, but email one-off promotions are only one segment of book discovery. Perhaps the title of this piece might be “8 Email Ebook Discovery Services” instead, to be more accurate?

    BooksGoSocial.com, which I founded three years ago, provides its main reach through social media, Twitter & Facebook, to enable discovery over the long term, to over 709,193 followers.

    The idea that email is the only discovery option for authors is simply incorrect. There are other social media services as well as BooksGoSocial providing social media discovery services.

    Secondly, short term one-off book promotion spikes are useful and can have a tailing effect, but in our view a longer term daily increase in sales, moving an author from average sales of one book a day to average sales of ten books a day, for instance, will have a greater sustained impact on author earnings.

    Well presented, well priced books in popular genres can achieve email driven spikes in sales, and be supported with longer term social discovery services, reducing the need for authors to spend valuable time sustaining their social media presence.

    Sustained increased sales, through low priced, long term social book discovery, is a real alternative to the services you describe.

    We are, in fact, so confident of our ability to help authors, we offer a 60 day money back guarantee. If a book fails to sell at any of the email book discovery services you reviewed the author is unlikely to even get a reply if they ask for their money back.

    Herding authors towards one off promotions with no money back guarantee is a limited approach to ebook discovery.

    • John Doppler June 4, 2016 at 10:48 am #

      Thank you, Laurence!

      “8 Email-Based Genre-Specific Ebook Discovery Services Compared” was a bit too wordy for a title, but it certainly wasn’t my intention to imply that email was the only option — it’s just the focus of this particular analysis.

      Data for other channels such as apps, websites, social media, etc., is harder to come by, and makes for a trickier comparison, but that project is on my To Do list.

  12. Mark Gillespie June 3, 2016 at 3:18 am #

    Jeez, that’s amazing John. Thanks for this.

    Whenever you update I’d be curious to hear your take on KND Highlighter and BK Knights – which for a book promotion service operating out of FIverr, seems to be considered quite highly.

    • John Doppler June 5, 2016 at 4:49 am #

      Thanks, Mark! Neither of those services qualified for this comparison, but I’ve heard positive reviews from clients of both services. I plan to take a closer look at both.

      I’ll have to say that BK Knights’ Fiverr-based service is definitely one of the more unusual ones out there! It makes me curious why they haven’t made the transition to a business with a more solid web presence.

  13. Leslie Tall Manning June 2, 2016 at 11:13 pm #

    Thanks so much for taking the time to gather the info, break it down into categories, and share all of it with writers. I could not ask for a better comparison. Now, to pick the one that is right for me!
    : )

  14. Karen Inglis June 2, 2016 at 8:41 pm #

    Many thanks for a great post, John – and good to see stats for children in here. I will try to break into BookBub again on the basis of this – especially now my books are on all platforms again. Very useful.

    One thing I’m not clear on in the early part is when you talk about the number of Amazon reviews needed. Does this mean across both UK and USA? For example, I have 43 reviews for The Secret Lake in the UK but only 15 in the USA. And (more problematically) 16 for Eeek! in the UK but only something like 4 in the USA. If sites like BookBub only take account of US reviews then raising the profile in the USA of a book that has had a good number of 5-Star reviews in the UK becomes problematic… I know you did specify one site that counts reviews across more than one Amazon store, but does that mean that by default where you don’t mention this that site is only looking at US reviews?

    Thanks again…

    Karen

    • John Doppler June 2, 2016 at 11:56 pm #

      Great question, Karen! Most of the services default to counting US Amazon reviews, but if you mention that the majority of your reviews are in the UK, I’m sure they’ll take that into consideration.

  15. Jay Artale June 2, 2016 at 6:56 pm #

    Brilliant Article John … so great to see that my niche (non fiction travel) get a mention and interested to see that Travel is one of Bargain Booksy’s strengths. Invaluable!

  16. Clare Lydon June 2, 2016 at 5:59 pm #

    Brilliant article John, well done. Really useful stuff for LGBT fiction – I’ve done Bookbub and will now also try Fussy Librarian. Thanks!

    • John Doppler June 3, 2016 at 12:01 am #

      Thank you, Clare! Good luck on your promotion!

  17. M. Louisa Locke June 2, 2016 at 3:19 pm #

    This was very helpful, particularly in giving the comparisons for the specific genres and sub-genres. So often we are left to go by the anecdotal evidence of other authors which can be helpful. But unless our books are identical in market, its hard to judge whether or not that site will work for us since milage varies so much. 🙂

    Thanks again,

    M. Louisa

  18. Peter Ralph June 2, 2016 at 2:18 pm #

    Staggered that Ereader News Today didn’t rate a mention. Outside of BookBub it leaves anything else for dead both in cost and coverage. I’ve used both and the ENT cost per download is significantly less than BB’s. You get more downloads with BB but ENT is far better value.
    Still pinching myself that ENT didn’t rate a mention. Its email subscriber list would probably exceed the aggregate of all other sites mentioned above (excluding BB).

    • John Doppler June 2, 2016 at 2:34 pm #

      Hi Peter,
      Unfortunately, ENT does not post their statistics, and they did not respond to requests before the article was published. Without that information we cannot make a fair comparison to the other services.

      If they provide that information (and I hope they do), I’ll be happy to include them in the next iteration of this article.

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