I wasn't really aware of what I was getting myself into; it said psychological thriller and was on ads for Kindle. But I found myself reasonably surprised with the pace and shock value of certain things.
I'm not much for gratuitous sex scenes in books but the contrast of Ella and Charley's sexual encounters brought out the major differences, i.e. Ella was a crazy bitch.
It was a strange change of pace but was a visceral, gritty experience. If these books weren't so linear I would actually pick them up more often than never.
I recommend this one because it seems more accessible than most that I can't get passed the first chapter of.