I'm reading Duma Key and am picking up lots of themes from other books. For example, one man who can't sleep says he feels like he's floating above himself like a balloon. This is an obvious ref to insomnia. I've read about links between books with randalf flagg and other baddies with RF initials. I would like to know more about these themes. Does anyone know if anyone's written anything i can read up on? It's something I'm interested in because I'm going back and re-reading the old SK's.