American writer of non-fiction mostly centering on the occult, cryptozoology, and the paranormal.
He worked at Time Inc. and Science Digest before focusing on his children's book writing.
His 1974 book Curses, Hexes and Spells has been banned in the past due to its subject matter.
His daughter, Theodora, was killed in the bombing of Pan Am Flight 103 and he published the book Pam Am 103: The Bombing, The Betrayals, and a Bereaved Family's Search for Justice with his wife, Susan Cohen.
He attended the University of Illinois at Urbana-Champaign around the same time as journalist and political commentator Robert Novak.