Another one and a rarity is Gorden Honeycomb's Dragon Under the Hill. It's about a little boy who becomes possessed by some ancient forces from an uncovered Viking grave - seriously scary.
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Oh, yes. I forgot about The Shining; it's truly horrifying. I read it one summer on vacation in Spain, and I recall being scared $#!xless while alone in the room. I was near a beach, on a hot July night, nowhere near a snow-bound hotel in Colorado and I was too freaked out to go to the bathroom (that dead woman in the bathroom . . . oy!)

Did you ever read Gordon Honeycomb's Neither The Sea nor The Sand, about a man who dies but comes back out of love for his wife, only he's a corpse? It was unnerving; I remember it made a tremendous impression on me.