This article is about Google’s book search engine. Books are provided either by publishers and authors, through the Google Books Partner Program, or by Google’s library partners, through copy google books to pdf Library Project.
Additionally, Google has partnered with a number of magazine publishers to digitize their archives. The Google Books Library Project, which scans works in the collections of library partners and adds them to the digital inventory, was announced in December 2004. In response to search queries, Google Books allows users to view full pages from books in which the search terms appear, if the book is out of copyright or if the copyright owner has given permission. If Google believes the book is still under copyright, a user sees “snippets” of text around the queried search terms. All instances of the search terms in the book text appear with a yellow highlight. In-print books acquired through the Partner Program are also available for full view if the publisher has given permission, although this is rare. For in-print books where permission has been granted, the number of viewable pages is limited to a “preview” set by a variety of access restrictions and security measures, some based on user-tracking.