I don’t consider this spoiler, but I know some people here are pretty fanatical about that type of thing, so I’m going to spoiler-space it anyway. It reveals nothing not in the ‘Publishers Weekly’ description of the book on the Amazon.com page.
I just started listening to the audio book on my commute, and there’s a scene where the protagonist sits with his hands clenched in his lap. Problem is, the guy only has one arm. I don’t think it’s a phantom hand being described, either.