My special guest tonight is true crime author Susan Hall, creator of The World Encyclopedia of Serial Killers—the most comprehensive collection of its kind in the history of true crime publishing. This groundbreaking four-volume set profiles more than 1,600 male and female serial killers from around the globe, from infamous names like Ted Bundy, Dean Corll, and Donald Harvey to obscure murderers whose crimes are no less chilling. Defined by the FBI as killers who take the lives of three or more victims over time with breaks between murders, serial killers have haunted human history—and according to estimates, at least fifty are active in the United States right now. In this conversation, Susan takes us inside Volume One (A–D), featuring approximately 500 killers and their disturbing crimes, offering an unflinching look into the darkest corners of human nature.