This shocking, but thought-provoking, analysis of some of the world's worst serial killers looks at their early years in an effort to understand - why? Why do human beings turn into killing machines? Are they born to kill or are they trained to kill? Is there really a 'demon seed' within certain individuals that ensures they are destined to commit serial homicide from conception? The authors have spoken with killers all over the world in a quest to understand what makes them go bad. They were, after all, born into this world as innocent children. The result is the inner workings of the minds of the most destructive individuals on the planet are revealed in stomach-churning detail. The book also shows how developing serial killers can be predicted through the use of an incredibly sophisticated system of psychological profiling. You too may be able to tell if the person you're sitting next to has the potential to kill. This is the ultimate guided tour into the darkest places on our planet.