John Irwin (1929 - 2010) was known internationally as an expert in the American prison system. He earned his Ph.D. in Sociology from the University of California Berkeley and taught as a professor at San Francisco State University. He is the author of The Felon (UC Press), Scenes, Prisons in Turmoil, It's About Time: America's Imprisonment Binge (with James Austin), Lifers: Seeking Redemption in Prison and The Warehouse Prison: Disposal of the New Dangerous Class.