I love the Gutenberg Project. I don't know if you're familiar (or if s/f and fantasy are your cup of tea), but you might also check out the Baen Free Library (http://www.baen.com/library/). I've read several books from each.
Samira | Homepage | 02.18.06 - 12:17 am | #

Here's another that I like the best. The On-line Books page:

http://digital.library.upenn.edu/books/
WitNit | Homepage | 02.20.06 - 6:23 pm | #