Project Gutenburg gives you access to over 40,000 free e-books (these books include many of the classics of literature). These books are free (in the U.S.—in other countries, difference copyright laws may apply) because their copyright has expired. Project Gutenburg provides e-books in many formats and therefore their books should be compatible with a large number of devices. Additionally, some e-audiobooks are available.
Because these e-books are copyright-free, you don’t have to worry about them expiring and don’t have to worry about downloading/installing special digital rights management software such as Adobe Digital Editions. If you have any questions, contact the Library for assistance.