http://www.baen.com/library/ I posted in a thread about this, only to realize after doing so this really deserved its own dedicated thread for those who aren't aware of the repository's existence. You can download entire (good) sci-fi books from this site, no silly copy protection restrictions on them and in multiple formats, and I can personally vouch for the Dahak/Mutineer's Moon series, which is without a doubt my favorite sci-fi trilogy ever, even possibly my favorite trilogy, period. My friends tell me the Honor Harrington series by David Weber is excellent as well. Check it out and thank me later. Edit: tried to fix the title but it won't let me.