Complete chick-lit, but a good little escapist drama. Sibling rivalry, mental illness, parental love, unspeakable acts, repressed memories--good stuff! I would have liked to have delved into the relationship between Marnie and Quinn a bit deeper, but I'm in kind of a weird place right now.
4.25 stars out of 5, if you're looking for something lite :)
And because I'm in a random mood: http://www.youtube.com/watch?v=v-KX3XuUXpc