The ground-breaking psycho-analytical studies of Richard von Krafft-Ebing in the field of sexual perversion and mania shed light on some astonishing, and deeply shocking, case histories. At the very extreme of his investigations, detailed in the classic "Psychopathia Sexualis", were graphic studies of sadism, lustmurder, cannibalism and vampirism, necrophilia and necro-sadism; sometimes expressed in complex fantasies and nightmares, but in other instances all too real, as in the cases of the necrophiliac grave-despoiler Sergeant Bertrand, and of Victor Ardisson, the "human vampire" who was discovered raping a child's rotting corpse. Krafft-Ebing's work was most notably followed up by Wilhelm Stekel, whose own volume of 64 case histories, "Sadism and Masochism", included even more extreme examples of violent perversion, as noted in the section "Cannibalism, Necrophila, and Vampirism". This special ebook publication collects the most disturbing and notorious case histories of lustmurder, necrophilia and related criminal manias from both "Psychopathia Sexualis" and "Sadism and Masochism", affording a grim and unrelenting glimpse into the darkest voids of the human psyche.