The crime of mass murder is surrounded by myth, false assumptions, and misinformation. It is frequently sensationalized in the press, while the complex motivations of the perpetrator are ignored or soon forgotten. The mass murderer is rarely a crazed killer who lashes out against his victims in a mindless frenzy of violence. This book examines not only the crime of mass murder, but also the complex motivations of the mass murderer, presenting a completely new method of categorizing and analyzing the crime and its perpetrator. The evolving nature of the crime is examined in the context of actual case histories of mass murder in America. Kelleher's insights will be of interest to criminologists and anyone interested in the sociology of crime.