Award-winning author R. Barri Flowers has nearly 40 published books to his credit. A literary criminologist, Barri began his writing career with criminology and criminal justice textbooks, after receiving a B.A. and M.S. in criminal justice from Michigan State University. Many of these books went on to become bestsellers, including the Prostitution of Women and Girls; Murder, at the End of the Day and Night; and The Adolescent Criminal. Barri branched out into true crime writing with The Sex Slave Murders, which became a bestseller. He also co-wrote the bestselling true crime reference work, Murders in the United States: Crimes, Killers and Victims of The Twentieth Century. In October 2006, he received the prestigious Wall of Fame Award from his alma mater Michigan State University and its renowned School of Criminal Justice.