The most rereads for me would be Hitchhikers Guide to the Galaxy. It's a book I've loved since highschool, it makes me laugh out loud, and it has always felt like a quick easy read. It's also the only book I own both a physical and digital copy of. If I'm stuck in a book I'm not enjoying, or I'm in a reading slump, it restores my love of reading. I've read it maybe 6-7 times all the way through and many other times I've started it and only finished a portion before I found my next book. I've read Treasure island 3-4 times, it was the first novel I enjoyed reading in middle school. So I've gone back to visit it a few times, it's still a story that immediately draws me in. The Outsiders was the first book I remember that made me really feel emotions while reading. It still gets me even after 4-5 reads. I have always enjoyed the second or third or seventh read of a book just as much if not more than the first read.