Did you know that Tor.com gives away a free ebook each month? All you need to do is sign up for their newsletter (and they don't send these out but once or twice a month, so it's not annoying! ;-D). Then, at the first of each month, they'll send out a newsletter with the link. The ebook is only available for a week, so you have to act on it pretty quickly. This month is The Bloodline Feud by Charles Stross. I think it's really awesome that they do this. You can download the ebook either in .mobi (kindle) format, or as an .epub. I have a kindle, so it's reallly easy to download the file, then send it on to my kindle. I've picked up a lot of really good books this way. Now to find the time to read them. ;-D
Anyway, here's the link, should you wish to take advantage of the offer.
Tor.com