You are really discussing, "What is science fiction?" here. That is a question I've seen people try to answer time and time again, and still never adequately answered. I think we can agree that he is an excellent author. As a child I used to read young adult science fiction, but it was a teacher at school who got me to read Ray Bradbury and so to begin to read more widely within the genre. People who write blurbs on books don't necessarily know what they are talking about. Unless I'm mistaken, Ray Bradbury himself once told a reporter that he had only ever written one science fiction book. I have always assumed that the book he meant was Fahrenheit 451. It is still a great book but I've already spoken about it in other threads here.