Book excerpt: Authors Roger Manvell and Heinrich Fraenkel, notable biographers of the World War II German leaders Joseph Goebbels and Herman Goring, delve into the life of one of the most sinister, clever, and successful of all the Nazi leaders: Heinrich Himmler. As the head of the feared SS, Himler supervised the extermination of millions. Here is the story of how a seemingly ordinary boy grew into an obsessive and superstitious man who ventured into herbalism, astrology, and homeopathic medicine before finally turning to the "science" of racial purity and the belief in the superiority of the Aryan people.