To me, this book suffers from second book syndrome. I didn't enjoy it as much as the first book in the series (and I didn't give that one 5 stars). It picks up immediately after book one. I had a huge problem with remembering who the non-major characters were, because there were no reminders (as in, Caleb, my brother, etc...) I would highly recommend reading them back to back, or perhaps even waiting for the third to come out before starting.
Besides the previous problem, what bothered me about this book is that while I know our heroine is 16, and filtering the world through a 16 year olds lens, I had problems with her worldview. One minute, she can't let go that she shot and killed someone (in self-defense) and then in another she's ready to storm Erudite headquarters and really believe that no one will get hurt.
It's okay to be reckless, but it just seemed inconsistent.