I read Lissey's Story, which I liked very much. That's the only book by him I read so far, but I have the first three parts of the Dark Tower somewhere in my book shelf and I intend to read those.
I know quite a few of the movies derived from his books. To this day I can't look at Tim Curry without remembering Pennywise (...which probably contributes to my thinking that the actor looks creepy as hell).
