Google Book Search Book Viewability API - Developers

Google Book Search Book Viewability
The Google Book Search Book Viewability API enables developers to: Link to Books in Google Book Search using ISBNs, LCCNs, and OCLC numbers; Know whether Google Book Search has a specific title and what the viewability of that title is; Generate links to a thumbnail of the cover of a book; Generate links to an informational page about a book; Generate links to a preview of a book.