Wow, this book is intense. It's absolutely not for the faint of heart. With that said, I loved it. It's a gritty "noir" kind of mystery/suspense thriller that is impossible to put down once you've started it. It kind of reminded me of Breaking Bad, in that it's about an ordinary person who decides to get embroiled in a criminal act, and it chronicles the fallout of that act. The characters' motivations are both murky and clear; I liked how they all seemed like real people, and reacted in logical ways to the events in the book. This book would make an amazing movie.
All in all, highly recommended, but fair warning that there is a lot of violence and etc. if that bothers you.