Do you like science fiction books? If you do then you should check out the Baen Free Library.
Baen Books is very generously making available (for free!) a number of its titles in electronic format. Anyone who wishes can read these titles online - no conditions, no strings attached. Or, if you prefer, you can download the books in one of several ebook formats (epub, mobi, etc.). Again, with no conditions or strings attached. Enjoy.
Also, check out an online database of Baen Free Library collection CD releases HERE.