I like the Dark Tower series. A lot. It just rolls so many of my favourite things into one narrative. Warner Bros, get the adaptation done. On another note, The Stand is a great work, but nonetheless induced grandiose nightmares unto my twelve year-old mind.
Well, I don't know about any books of his, which is probably pretty lame, but the movie which was most likely based on a book... Shawshank Redemption. I love that movie, and my little sister was named after the main character...