Actually there is manual labor involved, see http://techcrunch.com/2007/12/06/google-books-adds-hand-scans/ http://techcrunch.com/2007/12/06/google-books-adds-h

Actually there is manual labor involved, see http://techcrunch.com/2007/12/06/google-books-adds-hand-scans/ http://techcrunch.com/2007/12/06/google-books-adds-hand-scan... and http://books.google.com/books?id=lAIJAAAAIAAJ&printsec=frontcover#PPP3,M1 http://books.google.com/books?id=lAIJAAAAIAAJ&printsec=f...