Michael Mazzone has been a researcher on Golden Age Hollywood for more than 30 years, specializing in John Barrymore, Lillian Gish, and Errol Flynn. Mazzone's timely photo documentation of Mulholland Farm in June 1987 formed the foundation of Errol Flynn Slept Here, and his expertise in construction and architecture informed the narrative. He is approached often to help authors writing about Flynn and other topics.