Great book! It's more similar to Hunger Games than other recent dystopian novels, mostly because of the intensity and violence. Tris is strong but imperfect, and her developing romantic relationship is realistic and exciting. The concept of dividing society into factions is so interesting. I was sort of bothered by the fact that Marcus jumped off the train onto the roof, and managed to catch the edge at presumably high speed to dangle from it. Is that really possible? I did wish for a few more Chicago landmarks, but what was in there was fun. Exciting and fast-paced.