Our API directory now includes 53 books APIs. The newest is the Readmill API, a social platform for eReaders which we recently covered. The most popular, in terms of mashups, is the Google Books API. We list 11 Google Books mashups. Below you'll find some more stats from the directory, including the entire list of books APIs.


In terms of the technical details, REST and XML lead the way. There are 44 books REST APIs and 8 books SOAP APIs. Our directory lists 35 books XML APIs and 21 books JSON APIs.

The most common tags within books are 16 reference books APIs, 11 social books APIs and 10 library books APIs.

On the mashup side, we list 83 books mashups. We named Small Demons as mashup of the day in January. For reference, here is a list of all 53 books APIs.
Abundant Barnes & Noble Price API: Book price retrieval service.Track this API
aNobii API: Book sharing service.Track this API
Bertram Books API: UK book retailing service.Track this API
Bible Gateway API: Bible lookup services.Track this API
Bible Lookup API: Bible lookup service.Track this API
bkkeepr API: Book reading social services.Track this API
Blurb API: Social book publishing Platform.Track this API
Bol.com API: Dutch online retail store.
Book Glutton API: Convert HTML to EPUB.Track this API
Bookleteer API: Craft booklet creation service.Track this API
BookMooch API: Books exchange service.Track this API
Bookshare API: Accessible Books For Readers with Print Disabilities.Track this API
Bookworm ePub Reader API: Online book management service.Track this API
Bowker Book Metadata Service API: Book descriptive metadata service.Track this API
CatalogWS API: Academic Library.Track this API
Copac API: Search UK libraries.Track this API
Direct Textbook API: Book price comparison service.Track this API
ESV Bible Lookup API: Bible lookup service.Track this API
Feedbooks API: Mobile book and RSS services.Track this API
Goodreads API: Book search and social book services.Track this API
Google Book Search Book Viewability API: Book search.Track this API
Google Books API: Book search services.Track this API
Hathi Trust Data Distribution API: Library catalog search service.Track this API
hon.jp API: Japanese eBook metadata service.
I'vRead API: Social Reading Record.Track this API
iTrackmine Simple API: Collection sharing service.Track this API
Library of Congress SRW API: Information database search.Track this API
Library of Congress Subject Headings API: Access to the Library of Congress Subject Headings.Track this API
LibraryThing API: Books database and community.Track this API
Living Stones API: Bible lookup service.Track this API
Luzme API: Ebook price data engine.Track this API
New York Times Best Sellers API: New York Times best-seller lists data.Track this API
O'Reilly Product Metadata Interface API: Book and publishing industry metadata interface.Track this API
Open Library API: Library data access.
OReilly Safari API: Book search.Track this API
PaperBack Swap API: Book exchange service.Track this API
PubEasy API: Publishing and book sales information service.Track this API
Random House API: Book search and viewing service.Track this API
Readernaut API: Social book review service.Track this API
Readmill API: Online eBook discussion platform.Track this API
ReadSocial API: Social reading service for reading applications.Track this API
SendToReader API: Send web pages to Kindle devices.Track this API
SharedBook API: On-demand reverse publishing system.Track this API
SharedBookshelves API: Book sharing service.Track this API
TasteKid API: Taste discovery service.Track this API
Unglue.it API: Digital content relicensing service.
USA Today Best-Selling Books API: Best-Selling Books Information Service.Track this API
USA Today Book Reviews API: Book review service.Track this API
What's on My Bookshelf API: Book trading community service.Track this API
WorldCat Identities API: Library data access.Track this API
WorldCat Search API: Library data access.Track this API
WorldCat xISBN API: ISBN and book edition linking service.Track this API
Yonda4 API: Reading lists and recommendations.Track this API