This casebook provides comprehensive treatment of international criminal law in a problem-oriented way. It draws widely from the jurisprudence of the various international and hybrid criminal tribunals, United Nations bodies, regional human rights institutions, domestic courts, alternative or traditional processes, and transitional justice institutions. Its focus is on the core international crimes within the jurisdiction of the ICC, supplemented by chapters on the standalone crimes of torture and terrorism. This edition includes substantially more material from the International Criminal Court, particularly on some of the recent jurisprudence on admissibility and developments with respect to head of state immunity, drawing on cases arising out of the Mali, Ukrainian, and Palestinian situations. This edition also includes new discussions of universal jurisdiction (given its growing use in combating impunity in Syria, among other places), aggression (given the Russian attack on Ukraine), and hybrid tribunals (which continue their resurgence in, inter alia , the Central African Republic, Liberia, and The Gambia).