Hans Holzer, whose investigations into the paranormal took him to haunted houses all over the world, most notably the Long Island house that inspired “The Amityville Horror,” died on Sunday at his home in Manhattan. He was 89. The death was confirmed by his daughter Alexandra Holzer. Mr. Holzer — who wrote more than 140 books on ghosts, the afterlife, witchcraft, extraterrestrial beings and other phenomena associated with the realm he called “the other side” — carried out his most famous investigation with the medium Ethel Johnson-Meyers in 1977. Together they roamed the house in Amityville, in which a young...