Those who kill neither for money nor revenge but out of sexual desire have been objects of unparalleled revulsion, and yet their motives and methods often fascinate us in a way that ordinary criminals do not. Why is it that for these men – and sometimes women – sex is invariably linked to acts of extreme violence and sadism? And what do their horrifying crimes reveal about the nature of the sexual instinct? In this book crime reporter Norman Lucas, with help of forensic psychiatrist Dr Arthur Hyatt Williams, examines the cases of thirty sex killers including – * Pauline and Juliet, the teenage lesbians whose bizarre fantasies ended in murder * Peter Kuerton, the 'Monster of Dusseldorf’ * Sylvestre Matuschka, the Hungarian multiple-killer who found sexual satisfaction amidst the carnage of train crashes * Gordon Cummins, the 'Ripper of the Blitz’ * Neville Heath, the 'Casanova Killer’