I'm not sure exactly what I thought of the book. The story is interesting, but it felt that it wandered pretty deep into several of the variations and that the depth didn't necessarily add to the story in the end. By the last, I kind of felt tired of the various variations and was looking forward to the resolution. Interesting views of the post-apocolyptic world, and what happens when the world is covered in toxic radiation, but it couldn't overcome the slow movement of the story.