I would rate this a 3.5 - it was definitely gripping, maybe a little 'dark' for my taste. Overall, I tend to like books that keep me interested all the way through (which this one did) and even if I don't love the ending I will still rank it a solid 4 stars. But in this book the end really frustrated me- some of the choices that she made were just painfully dumb - and in the end ruined it a little for me.