And then The Haunting. As much a haunted house film as it is an exploration of a haunted woman. The horror of the film exists almost solely in Julie Harris's performance where her loneliness is so nauseatingly palpable, even the most sympathetic of viewers can't help but turn on her. She exists standing just outside of all the living players in the film, leaving her to be preyed upon whatever is no longer living. A staggeringly unsettling character study, and the purest representation of Shirley Jackson's very partivular voice in film.
And I had the film memorized before I ever got around to reading the book, and it's really remarkable how accurate the former is to the latter, in terms of tone/character/etc. Definitely one of the purest book-to-film jobs I've seen.