Open Library

Open Library is an initiative of the Internet Archive, a 501(c)(3) non-profit, building a digital library of Internet sites and other cultural artifacts in digital form. The Internet Archive is an American digital library with the stated mission of "universal access to all knowledge". It provides free public access to collections of digitized materials, including websites, software applications/games, music, movies/videos, moving images, and millions of books.

You can always directly browse the Internet Archive's Open Library to find other books available for digital lending. These books are in BookReader, PDF and ePub formats (and Daisy for the print disabled).  

You will need to sign up for an Open Library account to borrow e-books. Please visit the Borrowing Books Through Open Library FAQ page for more information regarding borrowing and browsing eBooks