John Edgar is the author of Criminal Identification and the Functions of the Identification Division of the Federal Bureau of Investigation, United States Department of Justice (1937), Address of Hon. John Edgar Hoover, Director, Feberal Bureau of Investigation, United States Department of Justice, Before the Sheriffs and Peace Officers Association of Oklahoma (1936), The Part of Youth in Law-enforcement (1936), Crime and the Citizen ... (1936), Excerpt from the Testimony of J. Edgar Hoover ... (1932).