This is a lot of people's favorite book in the trilogy, and I can definitely see why. It drives the story forward in a way that a lot of people weren't expecting. I still remember reading this for the first time and being absolutely shocked; I read the entire book in one night. Having that cliffhanger ending was the worst at the time, because it's such a great ending, but you need to know what happens next. Very much like the Scythe trilogy from Neal Shusterman. They both definitely have you hooked.