Whether you find Anson’s account scary or not probably depends on your level of belief in demons. Although he concludes his book with the suggestion that a combination of ghosts and a demon plagued the Lutzes and their priest, the focus of the narrative is clearly on the demonic. Fr. Mancuso suffers because the demon wants to keep him out of the house. The multiplication of flies, the constant waking up just after 3:00 a.m., and the smell of excrement all point to demonic activity. The book does have its share of historical inaccuracies and embellishments. It has been declared a complete hoax by some while others claim that at least some of what was described in the book happened to the blended family that called it home for less than a month. If you don’t accept demons, there’s little here to frighten you beyond a couple of benign ghosts.
As with any story claiming supernatural activity, we’ll never really know what happened. The Amityville Horror is often classified as a novel now. Our minds are conditioned to reject anything so terribly out of the ordinary that it is difficult to accept what you’re reading. The DeFeo family was undoubtedly murdered in the house by one of their own. The Lutz family did buy and then abandon the house in fairly short order for such an expensive purchase. There was a priest involved. The question marks hover about the supernatural elements, as they generally do. These are the ghosts and demons of the rational world which we inhabit. We safely confine them to fiction. Then we sleep at night with the lights left on.