Impersonating the daughter of a man imprisoned in the Nazi concentration camp of Dachau is risky work even for a woman as intrepid as Maisie Dobbs. She is in mourning for her husband, an English peer killed in a flying accident when she is persuaded by the British secret service to take on a job that will put her deep within the dangers of Hitler’s Germany. Jacqueline Winspear has always cast the character of Maisie Dobbs in challenging situations involving crime and espionage in World War I, but this is her first venture into a truly perilous situation. Maisie lives up to her reputation for being cool-headed even when confronted with the Gestapo in this thriller set at the onset of World War II. Her mission is to rescue Leon Donat, an engineer who is being held in Dachau and whom the German government has agreed to release only into the custody of a member of his family. The British are anxious to secure his release because of the potential wartime value of his military inventions, but the situation is complicated by events such as the German annexation of Austria which puts the English agent at increased danger of being captured. The concept of a woman who has to be disguised to look like Donat’s daughter fooling the Nazis is difficult to accept and the plot is not only fragile but rather flat.