The Amityville Horror is a book by American author Jay Anson, published in September 1977. It is also the basis of a series of films released from 1979 onward. The book is claimed to be based on the paranormal experiences of the Lutz family, but has led to controversy and lawsuits over its truthfulness.

On November 13, 1974, Ronald DeFeo Jr. shot and killed six members of his family at 112 Ocean Avenue, a large Dutch Colonial house situated in a suburban neighborhood in Amityville, on the south shore of Long Island, New York. He was convicted of second-degree murder in November 1975.

In December 1975, George and Kathy Lutz and their three children moved into the house. After 28 days, the Lutzes fled the house, claiming to have been terrorized by paranormal phenomena while living there.