God. I just don't know how to talk about this book. This book contains so, so many of the same elements as her other book, The Walls Around Us. But where in most instances this would seem tired, it works so well for her. It's like the two stories are companions, two different ways of telling the same story. It makes them exciting to read, knowing what she's trying to tell you, but still needing to hear it. Even knowing (or being pretty sure) of the key to the mystery in the foreground, you're still compelled to keep reading to understand WHY and HOW.