Finished: Foundation by Asimov. Pretty great, I liked the repeated theme that violence is just a bad solution, not a "wrong" one. You can sit around arguing philosophy all day, but if one path involves death and destruction and the other avoids it then it's hard to argue with results
In progress: Dragon Ball by Akira Toriyama. I got a color e-reader for Christmas so I've been seeing what Manga is like on it. It's funny and plays pretty fast and loose with its own rules. It's also much faster than watching the show