I only have a handful of books I rate a 10. These are the only books I would ever read a second time. For me, a book rated 10 will have a language all its own. It will make me think. It will make me read passages three and four times just because it's a pleasure to read aloud. It will give me an "A HA" moment in the middle or the end. It will leave me breathless and unwilling to to pick up start another book until I've fully savored it.