This book generated some really interesting ideas - if you are brought up in a violent environment, does it lead you to become violent yourself? Despite his inner battles, realising how easily he could kill people, and his sociopathic tendencies, Jasper was a really likeable character. He was cocky, but not too much so, determined, and although he didn't realise it, a genuinely kind person.I felt all the characters were pretty three-dimensional. Howie was the obvious comic relief, but this really worked, and it was nice that Connie was such a strong character - so many of these types of books have weak females in. I guessed the killer quite early on but this somehow didn't ruin the ending. The ending did, however, seem rather open, perhaps leaving room for a sequel. It did feel like things weren't quite rounded up.Personally I really enjoy crime novels, and this was fast-paced and easy to read, with intelligent characters.Also posted on my blog, Rinn Reads.