I really devoured this book. I love dark stories, and this was certainly one of those. It reminded me of the Mountain Goats album Tallahassee. Terrible people doing terrible things to each other is always engaging, and I was also surprisingly satisfied by the ending. It wasn't always believable, and it wasn't always eloquent, but this was one of the most tragic and ridiculous books I've read in a long time, and its insanity was simultaneously bracing and... Fun? 
 An addendum (2014/10/13): 
 After watching the movie adaptation and reading this review of it, I've cooled considerably with regard to this book. I feel it's flippant when it could try to say something, and the use of some serious social issues in what seems like such a backwards way makes me somewhat uncomfortable. I'd probably knock it down to 2 stars.