I keep forgetting to mention, but there are a couple of free novels by Jo Walton (winner of the World Fantasy Award, among other things) on her website. They're released under a Creative Commons licence for non-profit distribution.
The Rebirth of Pan was her first, and unpublished novel, a rather strange fantasy.
And
The Prize in the Game (originally published by Tor, but out of print) is a fantasy based on the Irish myths about Cuchullain, set in the same world as her novels The King's Peace and The King's Name.
They're both in HTML format, but I'm sure the nice people here will translate them into other things. I'd like to see them on Feedbooks, personally
This has been a public service announcement, and has nothing to do with the fact that the author is my ex