"In her role as consultant to a variety of law enforcement agencies, including the FBI, forensic psychiatrist Morrison has interviewed and studied such notables as John Wayne Gacy, Ed Gein, and Wayne Williams, along with many other, less well known but equally horrific serial killers. Her memoir is not what you might call pleasant reading; it is relentlessly unpleasant, as a matter of fact, as Morrison describes these men and women and their crimes in precise, often graphic detail. At the same time, however, it is a profoundly enlightening book. Morrison provides startling insights into what factors breed serial killers, and she avoids the broad generalizations that make other books of the topic seem slick and superficial. Still, Morrison recognizes that experts have only the sketchiest understanding of what makes a person commit murder repeatedly. This is an absorbing, disturbing book that makes it clear just how much we have yet to learn."