Wow. 5/5 stars. My first 5* book this year! 
 This review was originally posted on my book blog at: https://clairehuston.wordpress.com/20... 
 I made the mistake of starting this book at 10.30 p.m. I was still reading it at 1.40 a.m. and I put it down very, very reluctantly. I'd finished it by lunchtime the next day. It's that good. 
 Right from the first page you feel you're sitting on Jasper "Jazz" Dent's shoulder. Sometimes that's downright unsettling, but mostly it's nail-biting "can we get to the next victim before they die?" stuff. I had to resist the urge to flick forward to find out what would happen because at times it was just too tense. 
 As a main character, Jazz is great. His girlfriend, Connie, and best friend, Howie, are wonderful secondary characters. I particularly like Howie: a haemophiliac with a wicked sense of humour. I also developed a soft spot for the town sheriff, poor guy. 
 The mystery is well done. Enough plausible suspects to keep you guessing right to the end. And even though I now know who did it, I'm still not convinced the other guys are innocent! 
 This is categorized as YA, and Jasper's age (he's 17) does explain the one slight quibble I have with the book: his internal stressing about whether he's destined to become like his Dad goes on a bit too much, particularly in the second half of the book. We get it, he's traumatised. It's completely understandable and I feel for him. But when we've already had a few chapters which are mostly just him dwelling, I think we could reduce the dwelling down to the occasional paragraph, right? 
 But YA does not equal sanitised. Oh dear no. This is a book about serial killers and it doesn't shy away from telling you about the very nasty ways they killed/kill their victims. It's mostly reported second-hand, and there's no gratuitous violence, but if this whole topic is something you don't want to go near then this isn't the book for you. It's downright creepy in places too... *shudders*. 
 Overall: This is a story about serial killers and so, obviously, is rather nasty in places. If that doesn't put you off then I would urge you to read this book. Just don't start it late at night if you have to get up early in the morning.