This a very well written book with a rather original topic.
The hero of the story is a 15 year old sociopath who knows deep inside that he is a serial killer waiting to happen. He develops rules to keep his monster at bay. Then bodies start turning up in his small town and he find himself in a precarious position of identifying the serial killer and not being able to go to anyone else with the knowledge he has.
A good first effort by Dan Wells. I am looking forward to reading the other two books of this trilogy.
FYI, I received the book for free through Goodreads First Reads.