What does it do?
GBD Software: It is a free software which can helps you to save any books from Google books to your PC. And gives you the time to read it later. Very Easy to save any book to your desktop from Google Book.

How does it works?
You may save any book from Google Books marked as ‘Full view’ and can even partially download any book from Google Books marked as ‘Limited preview’.
Note: Only Access to the US users and can access to any book which are available only for US citizens. And an amazing feature is that it can searching all for hidden pages (not indexed by Google Books), Wow!!.