SCOTT CHRISTIANSON, Ph.D. is a prize-winning author and investigative reporter who also works in documentary film. His books include 100 Diagrams That Changed the World, With Liberty for Some: 500 Years of Imprisonment in America; Condemned: Inside the Sing Sing Death House; Notorious Prisons: Inside the World's Most Feared Institutions; Bodies of Evidence: Forensics and Crime; Freeing Charles: The Epic Struggle to Free a Slave on the Eve of the Civil War; and The Last Gasp: The Rise and Fall of the American Gas Chamber, among others. His articles have appeared in The New York Times, Washington Post, The Nation, Village Voice, and Newsday.