Author of Mack Sennett's Fun Factory. Co-author of The Films of the Bowery Boys. Have written for Daily Variety, The Moving Image: AMIA Journal, Slapstick!, Turner Classic Movies, and contributed essays, audio commentaries and documentary interview comments for such DVDs as The Forgotten Films of Roscoe "Fatty" Arbuckle, Lost and Found: The Harry Langdon Collection, Becoming Charley Chase and Showtime USA.