These are only books and manuscripts; all other sources (newspaper articles, etc.) are cited in full in the footnotes.
Brinkley, John. Shadows and Sunshine. Published by John R. Brinkley, 1923.
Brock, Pope. Charlatan: America’s Most Dangerous Huckster, the Man Who Pursued Him, and the Age of Flimflam. Crown, 2008.
Crawford, Bill & Gene Fowler. Border Radio: Quacks, Yodelers, Pitchmen, Psychics, and Other Amazing Broadcasters of the American Airwaves, Revised Edition. University of Texas Press, 2002.
Flower, Sydney. The Goat Gland Transplantation. New Thought Books, 1921.
Lee, R. Alton. The Bizarre Careers of John R. Brinkley. University Press of Kentucky, 2002.
Reardon, James. All Is Forgiven, Dr. Brinkley: The True Story of Dr. John R. Brinkley The 20th Century’s Greatest Medical Showman. Unpublished manuscript.
Wood, Clement. The Life of a Man. Goshorn Publishing Company, 1934.