The Holocaust in Hungary was characterized by the collaboration between the Hungarian government and the German occupiers. It resulted in the systematic murder of a significant portion of Hungary's Jewish population, primarily during a short period between May and July 1944. This destruction represents one of the most perplexing chapters in Holocaust history. The book argues that it was primarily orchestrated by one man, Adolf Eichmann, influenced by four key factors: Nazi ideology, Hungarian antisemitism and collaboration, the compliance of the Jewish Council, and the passive role of influential figures like Franklin D. Roosevelt. The book further argues that Rudolf Kasztner and the Jewish Council acted mainly out of fear. Their compliance significantly shaped Eichmann's decisions and enabled him to rely on Hungarian help to gather victims. Bystanders, too, not only failed to save Jews—despite options available—but also influenced Eichmann's actions. Incorporating a novel analytical framework for analyzing risk factors and triggers for genocide, and highlighting bystander responsibilities, Moshe Barides proposes new terminology to help prevent future atrocities.