I'm getting pretty close to finishing ACoK. Great book. Man, the show really started changing a lot of stuff in Season 2. But so far, I can't say I'm upset about any of the changes. In fact, the show's Arya/Tywin plotline at Harrenhall was an improvement over the book. But the book explains much better how Roose Bolton came to control Harrenhall, and I wish they hadn't cut that fight scene.