All the Frequent Troubles of Our Days: The True Story of the American Woman at the Heart of the German Resistance to Hitler

by Rebecca Donner

By the end of the week, they have deciphered three words. On July 14, 1942, they crack the cipher wide open. 5. The Gestapo has three addresses now. Arvid and Mildred Harnack’s. Adam and Greta Kuckhoff’s. Harro and Libertas Schulze-Boysen’s.