Get free e-books from the library
Before you purchase e-books from vendors like Amazon or from the iBookstore, see what your local library has to offer. With a library card and a free application, Overdrive Media Console, you can download free e-books and audiobooks to your iPhone (and any other iOS device), BlackBerry, Android device, or computer.
Remember, though, that most libraries might only carry a few copies of each title, so be ready to wait your turn. Additionally, most books have a loaning period of 7 to 14 days, so there's no room for procrastinating here.