I go to the newsgroup binaries alt.binaries.e-books and then convert the e-books into a format that fbreader can work with. Mobipocket also has a big selection of books for purchase and for free. If you have garnet vm installed, you could emulate the mobipocket reader and run it in the Nokia, but the easiest option would be just to use google and do a search for all the free books online and then find the numerous programs out there that will convert it into a readable format.