I’ve always had trouble labeling King as horror just because most horror is gruesome, and King rarely is. I used to be critical of his work because of that before I’d ever read it, and then once I started reading him I realized that how he’s marketed is very different from what his work is in reality. King didn’t like the movie of the Shining because it’s not at all like the book. But it IS a fantastic movie in its own right. Just go into it knowing it’s a very different story from the book.