There was this chapter that was insanely disturbing; you see a character being unwound. See him lose his sense of self, but still know what's going on. Even though he doesn't feel any physical pain, he's scared and wants to live.
Because of this book I've thought a lot about what I think and how I judge people, especially the younger kids. I've also added every other book by Neal Shusterman I could find to my to-read pile.