I Hunt Killers has completely cemented my love for Barry Lyga. As a huge fan of detective fiction and Criminal Minds, this book was right up my alley. 
 The characters have to be my favourite part of the book. 
 I love Jasper "Jazz" Dent. The dynamics of his character were amazing. He's charming, witty, but also deeply twisted. But that's to be expected when you grow up with a serial killer as a father. I loved how the constant inner struggle that Jazz endures was illustrated. Following his thoughts, the reader is able to see exactly how a killer thinks, which was both fascinating and horrifying. Jazz is really the epitome of the fine line between normal and sociopath. The debates and questions surrounding "nature vs. nurture" and "will we turn out like our parents?" are explicitly discussed in this book. 
 Luckily for Jazz, he has his best friend Howie (whose humour I absolutely love) and his girlfriend Connie (who is the only one able to match him) to give him as normal a life as possible. 
 Billy Dent has to be the most terrifying serial killer I've ever come across. His ability to transform and manipulate chills me to the core, and makes me relieved that he only exists in a book. 
 This is definitely one of my new favourites and I can't wait until the next one is released!