I have this strange "Thing" of never reading a book more than once, no matter how much I enjoyed it. I have hundreds of books on my shelves and while I can't say I've read all of them, I'd say well over 95% have been. There's a few I'm still to read and there are a very few I've started but just not finished for one reason or another. I do love my books though and as you say, it's comforting to be surrounded by them.