Extremely well-done, but genuinely disturbing. Hard to find anything to criticize here: the characters are rich and fully-drawn with actual flaws, not romance-novel pretend flaws. The generous length gives the author plenty of time to explore her themes, but it never drags--quite the opposite. I couldn't put it down, but I was also majorly on edge and anxious for most of the second half. It's one of those books where you feel that something can go seriously wrong for the characters--it doesn't feel like a romance much of the time. And the disturbing elements pushed right up to my limits--I found some parts quite hard to read, as much for the psychological anguish as the physical pain--and the above mentioned anxiety. I don't think I've read its equal in the exploration of sexual slavery. All in all, I highly recommend but pay attention to the content warnings.