From the Official Google Blog, November 3, 2006: “The world’s libraries are a tremendous source of knowledge, much of which has never been available online. One of our goals for Google Print is to change that, and today we’ve taken an exciting step toward meeting it: making available a number of public domain books that were never subject to copyright or whose copyright has expired. We can show every page because these books are in the public domain. (For books not in the public domain we only show small snippets of the work unless the publisher or copyright holder has given us permission to show more.)”