Since there are admitted ebook users here some of the mentioned ebook sources:
http://www.gutenberg.org/free in various ebook formats
If you need to convert from one ebook format to another the one I prefer:
http://calibre-ebook.com/2) Newsgroups- a good source of ebooks in some narrow genres
eg:
alt.binaries.e-book.fantasy
alt.binaries.e-book
alt.binaries.e-book.technical
Now since most ISPs have killed newsgroup one of the more affordable news services is:
http://www.forteinc.com/apn/index.phpMight as well buy their newsreader(Agent) while you are there, its pretty good.
Somebody have more?