It is a very good book. I was so excited to read every page as it got interesting page after page. The author has a really good understanding of the psychology of a serial killer. The line 'Keep your girls safe. Boys safer.' Itself was a mysterious line that it will make you open the book and read it.
Anyways, I highly recommend this book for a reader who likes to explore generes and even for people who are dedicated to the genre of this book.