Again Stéphane Bourgoin manages to bring us into the world of Serial Killers he met or studied. Through these various portraits both in the time and in the countries from which these people come from, he shows us two sides of the coin. The children they were, for the most tortured or neglected, and they have become the executioners. This book is an opportunity to examine in depth on the society's links with men and children, how is it that the links were cut profondémment if these living beings no longer feel any empathy killing their similar ... It remains a mystery for the FBI or psychiatrists who study ... One regret for this book, it is not longer and there is no portrait serial killer woman.