As a United States war crimes investigator during World War II, Benhamin B. Ferencz participated in the liberation of Nazi concentration camps. He returned to Germany after the war to help bring perpetrators of war crimes to justice and remained to direct restitution programs for Nazi victims. In Less Than Slaves, Ferencz describes the painstaking efforts that were made to persuade German industrial firms such as I. G. Farben, Krupp, AEG, Rheinmetall, and Daimler-Benz to compensate camp inmates who were exploited as forced laborers. The meager outcome of these efforts emerges from searing...