Peter Vronsky is an author, filmmaker and investigative historian. He is the author of two bestselling books on the history and psychopathology of serial homicide: Serial Killers: The Method and Madness of Monsters and Female Serial Killers: How and Why Women Become Monsters. He began writing about serial killers after he had brief random encounters with two different serial killers before they were apprehended, one in New York City in December 1979 and the other in Moscow in October 1990. He holds a PhD in history from University of Toronto.