Stephen King has a gift for making topics you never thought you'd be interested in fascinating. It doesn't sound like much of a book when you read the synopsis, but it's really a beautiful novel. 
 For being in the horror/thriller genre I didn't find it to be either, but I did find it absolutely gripping. I couldn't put it down and read the entire thing in two days. 
 My complaint about it is the same complaint I have about most of King's novels: his dialogue is really self-indulgent and unrealistic to me. Interactions between two characters tend to be long, ramblings that never sound right to my ears. Secondly, his endings are always the weakest parts of his novels. He's genius at building up tension and then always dissipates it in the most unsatisfying way and this novel is no exception, but like all his books the build-up is so good it's hard to fault it too much for that.