Check out DailyLit, which offers small chunks of big books in your inbox daily.
"We created DailyLit because we spent hours each day on email but could not find the time to read a book. Now the books come to us by email. Problem solved."
Lots of the classics, naturally (they're in the public domain), but also some modern stuff that was released under the Creative Commons liscence. Coool.
(via sfscope.)