Personally, I found the book super. But the potential reader be warned: this book is brutal, morbid, murders describes relatively faithful detail and generally goes under the skin. I've read a lot of thrillers and this is the first in a long, long time, which I was really impressed.
Jasper "Jazz" is actually a normal 17 year old boy who lives in a small town of the USA. He has a crazy best friend and an extremely sympathetic and powerful friend. However, his father was considered the greatest serial killer of America arrested with more than 100 victims weiterher. That would all be bad enough if Jazz had not grown up with brainwashing and is convinced that he will also eventually end up as murderers.
And as a reader you are you because also uncertain! The authors is a tightrope succeeded because Jasper is not an easy character. Mostly he is sympathetic, arrogant, self-confident and has a sense of the serial killer he immediately diagnosed the body in as victims of a new series. This starts copying the murders of his father. Unfortunately, God is the voice of his father deep in his head, so he fights against an internal enemy.
The voice of his father welcomes the reader in a very dark psyche full of violence, coolness and danger. Compassion does not exist and the victims are just one Mittle to an end. Jasper itself is not always the right empathy and generally makes you look about him worry. Because the book could go at any moment in both directions: either Jazz defeated the dark side or he is really a murderer. And that dares you to him, and that could happen! He is so taken by his father, that he even his girlfriend partially so attractive was because they do not correspond to the profile of his father.
The end makes it clear that there will be a continuation and ends generally with some questions that must be answered definitively.
Conclusion: the reader with strong nerves will love this book. All the characters are well drawn, the world feels real and dangerous one feverish all the time. What is jazz, and how will he decide. Rarely have I so so real and so brutally read a conflict in a YA (where you would have arrived back at the first question).