Judge Mettraux's four-volume compendium, International Crimes: Law and Practice, will provide the most detailed and authoritative account to-date of the law of international crimes. It is a scholarly tour de force providing a unique blend of academic rigour and an insight into the practice of international criminal law. The compendium is un-rivalled in its breadth and depth, covering almost a century of legal practice, dozens of jurisdictions (national and international), thousands of decisions and judgments and hundreds of cases. This second volume discusses in detail crimes against humanity.