Serial Killers: The Method and Madness of Monsters, Female Serial Killers: How and Why Women Become Monsters, and Sons of Cain: A History of Serial Killers from the Stone Age to the Present are all bestselling true crime books by Peter Vronsky. He is an author, filmmaker, and new media designer as well as an investigative historian. He is a Ph.D. holder. in criminal justice history and international relations espionage from the University of Toronto.