Crime stops at no one. The human is the only animal that attacks its own species for no reason, or for a "vile reason". Although it is an ungrateful distinctive feature, there have been cases that have stood out for their cruelty and sadism. Many of them, were committed by deranged people who have only managed to "enjoy" life, leaving a trail of blood for each step they took. History indicates that sometimes reality surpasses any horror fiction and that crimes occur in the most diverse social classes, countries, and times. Some have never been cleared up, others could still be cleared up decades later. This book compiles the biography (psychological profile, upbringing, motives) of the fifty worst murderers in history, detailing their crimes, victims, methods used, and final destination.