The conversation between human and AI assistant.
Which is the scariest novel ever written without featuring vampire's and exorcist by William Peter Blatty?
Do you know any scary novels that do not feature vampires or exorcisms written by William Peter Blatty?
Yes, I believe "The Exorcist" author also wrote a novel titled "Legion", which is a sequel to "The Exorcist" but does not feature any vampires or exorcisms. Another option could be "The Ninth Configuration" by Blatty, which has been described as a psychological thriller and horror novel.