Quick enjoyable read, if a repetitive one. I was really interested in the creepy twins; I would have liked to see more of them in a way that wasn't so info-dumpy. I'm also getting a bit of a Stephen King feel, in that I'm guessing from the reference near the end to bone clocks that there's some level of tie-in to Mitchell's earlier novel (which I haven't read), much in the same way King often shoehorns references into The Dark Tower universe. This isn't something I particularly enjoy - it often strikes me as more for the benefit of the author than the reader - but if that's what's happening here it is at least relatively minor, in that I don't feel I need to have read its predecessor to understand it.