Detlef Garbe is director of the Neuengamme Concentration Camp Memorial in Hamburg, Germany. He is the author of numerous publications about the history of the concentration camps, Jehovah's Witnesses and other marginal victim groups, military justice, and Germany's postwar confrontations with the National Socialist past. He is also the editor of "Beitrage zur Geschichte der nationalsozialistischen Verfolgung in Norddeutschland." Dagmar G. Grimm is a native of Bremen, Germany, who now lives in the United States. Her work as a translator and editor includes other works on the persecution of...