Who wrote the book upon which the plot of the Amityville Playhouse is associated?
The Amityville Playhouse: The Amityville Playhouse is a 2015 horror film and is loosely based on "The Amityville Horror" but only using the location as a plot point. The Amityville Horror: The Amityville Horror is a book by American author Jay Anson, published in September 1977.
Jay Anson