Born and raised in the United States, Mildred Harnack was studying for a PhD in Germany when she witnessed the meteoric rise of the Nazi Party. In 1932, together with her husband Arvid Harnack, she promoted the creation of a clandestine group that by 1940 had become the largest anti-Nazi resistance group in Berlin. Mildred recruited new members, helped Jews escape, planned acts of sabotage and, after the outbreak of World War II, she spied for the Allies until she was discovered; she was sentenced to six years of internment in a concentration camp, but finally Hitler ordered her to be executed. In this compelling book based on a true story, one of the most awarded and acclaimed works of nonfiction in recent years, Rebecca Donner, descendant of Mildred Harnack, masterfully blends elements of the novel, biography, and thriller. Through a meticulous investigation that intertwines letters, diaries, secret documents and testimonies from survivors, the author explores the tragic decline of Hitler's Germany and the ins and outs of the clandestine struggle and draws an intimate and moving portrait of an enigmatic woman. forgotten by history.