Hell House

While I really liked the mood of the house and the terror of the haunting I was put off by the pseudoscience around mediums that was being thrown around. This has been made into at least a movie, the one I've seen is with Roddy McDowall.

This one has a married couple (scientists) and 2 mediums trying to get to the root of a very haunted house. They act as if it's just shenanigans that are going on, but then people are getting injured enough from the ‘ghosts' sexually assaulting them that they really should go to the hospital but they say nah. Then things get serious and there's a showdown with the supernatural. Who wins? You can read it and find out for yourself.