Planet Hulk, by Greg Pak, 416 pages
I think this was already pretty well summarized by the mighty moose, so I'll keep it short. All of Earth's superheroes team up to send Hulk away from Earth so he can't do any more harm. Then he lands on a planet where he is enslaved, incites a rebellion, and becomes king. I mean, there's alot of action in between those occurrences, but that's the meat of the story. I'm not really that interested in the Hulk, but this was interesting, and didn't require a whole lot of background knowledge. But when you reach the end, you'll realize that now you have to read World War Hulk to get some closure.