So you go to Project Gutenberg
and search all over their vast database for the classic literature in digital form that you like. Then you either read it directly in iSilo as a .TXT file, or (as I do) convert them to .PDB's for HotSync-ing to your device's RAM.
As a Mac user, I use PorDiBle
to do the connversion from .TXT to .PDB if I want to HotSync the files to the PDA's RAM. Or, if you want, iSilo will read .TXT files from the SD card if you transfer them to the card using a card-reader.
Free, classic literature is like a gold mine. Why would I want to pay for stories? Do a search on MobileRead for eBook sites and you'll come across 20-30 sites of free literature just waiting to be read on your PDA.