Since 1872, Bowker has been the world's leading provider of bibliographic information for publishers, booksellers, libraries, authors, and others. Bowker is the official ISBN Agency for the United States, its territories and Australia, and creators of indispensable products and services, such as Books In Print, that make books easier for people to discover, evaluate, order, and experience.

For more on the history of Bowker, visit the Syndetics Unbound Blog. is a social site for cataloging and tracking books and reading. Since 2006, members have added more than 155 million books and 170 million tags. LibraryThing data points are aggregated to create lists of similar and trending titles. User-created data, including reader reviews and tags, is hand-vetted by librarians.