We're currently working with many libraries to include their collections in Google Books. You can find profiles of some of our library partners on the Google Books Library Partner page.
Libraries receive a digital copy of every book we scan from their respective collections to preserve and, where copyright law allows, to make available to their patrons.
Many of the libraries we work with have publicly displayed their contracts, which show the full scope of their work with Google. These include: the University of Michigan, the University of California, the University of Wisconsin-Madison, and the University of Texas at Austin. Though not all of the library contracts have been made public, we can say that all of them are non-exclusive, meaning that all of our library partners are free to continue their own scanning projects or work with others while they work with Google to digitize their books.