More more more! I LOVED Heart Shaped Box by the way, and Joe Hill also has a book of short stories (That one I got autographed!) that is excellent, called 20th Century Ghosts.
I gotta say, Hell House is one of the scariest books I've ever read, it's right up there with The Exorcist and Amityvill Horror to me. OOOOOOhhhhhh! Here's a good one, if you can find it, it's called Julian's House, one of my all time FAVORITE books, and scary as all get out. Ghost scary, not gore scary.