Face to face with America's worst killers, FBI agent Robert K. Ressler learned to recognize the unknown monsters that walk among us and put them in prison. He used evidence at crime scenes to create psychological profiles of killers, from the victims they choose, to the method of murder, to the often grotesque souvenirs they take from victims. Ressler conducted dozens of interviews behind prison walls and learned strange first-hand stories from countless convicted murderers, including Ted Bundy, John Wayne Gacy, Edmund Kemper. Join Robert C. Ressler as he leads you on the hunt for the world's most dangerous psychopaths. The publishing layout of the book is saved in PDF A4 format.