Great book, great story. The main characters were really completely unlikable which normally would be a deal killer for me. (It's generally hard to invest in a story about people who arouse no empathy or kinship). I mean I hope I don't know anyone like these two reprobates. It reminded me of the Billy Joel song "The Stranger"... 
 Well, we all fall in love, 
 But we disregard the danger, 
 Though we share so many secrets, 
 There are some we never tell. 
 Why were you so surprised that you never saw the stranger? 
 Did you ever let your lover see the stranger in yourself? 
 Now, that being said, I did like some of the secondary characters and the pacing and plotting were brilliant. If you love mysteries this is a great choice. I can't wait to read something else by this author.