In an interview after George and Kathy took lie detector tests, they revealed for the first time to the public that they were still experiencing paranormal problems.

While two of these books were never released independently, they were included later in the publication "Amityville: The Evil Escapes."

They get The Amityville Horror published and have to deal not only with the supernatural but with skeptics and a never-ending line of press.

The most significant film similarity is when the family realizes they almost left Harry behind, causing George to run back to the house (although in the book, George runs down the driveway and into the boathouse, while in the film, he has to re-enter the house, falling through the stairs and into the well).

In his investigation of the property, Hans Holzer discovered that the house was possibly built on an Indian burial ground.

However, demonologist Lorraine Warren said that the force in the house was not bound there, implying it could have followed the family when they left.