One of the things I like about this series is that it's not just fantasy or sci-fi. When an author creates a new world that is either in the far future, on another planet, or completely new, there are certain limitations you have. Here, Stephen King has created a parallel universe to our world. He can use magic, technology, anachronisms, and historical references. It makes for a unexpected story and allows Stephen King to be very creative. So much so, that these books are very atypical for Stephen King, for the notable exception of the scene with the Haunted House. That was classic Stephen King.