I dunno, what do you give a book that makes you feel terrible for almost the entire time you read it? Yet you read it really fast because you just want to know what happens, and you want to get to what is hopefully a slightly more happier ending, and also because it really is good writing? I guess I'll give it 4 stars, but only because good writing can make you feel that way. Ever get that stomach-sinking, ulcer-inducing, stressful feeling when you learn something that just comes at you from left field? Totally unawares, you are suddenly privy to information about someone close to you and it affects everything. The way you view that person, the way you view your interactions with them, your self-doubt and your sudden inability to ever trust anyone again? Betrayal is an easy way to summarize that feeling, but it's always so much more than that. That is this book. This entire book.