Via inside GoogleBooks:
… In addition, we want people to be able to find these books in places other than just on books.google.com. So we’re in constant dialog with several prestigious cultural institutions, such as the Spanish National Library and the Bibliotheque Nationale de France, in order to help as many readers as possible around the world search and read public domain books. …
Quelle: http://booksearch.blogspot.com/2009/08/sharing-public-domain-books.html