Is this a different book and film than “House on Haunted Hill” which was always considered one of the scariest films when I was young.
Completely different. “House On Haunted Hill” is delightful, over-the-top camp (well, watching it as an adult, anyway). “The Haunting” scared the crap out of me when I was little, curled up around a black and white TV in the basement in the middle of the night - and still unsettles me as an adult, even though I know every word of it. :-)