Sisters in Resistance: How a German Spy, a Banker’s Wife, and Mussolini’s Daughter Outwitted the Nazis

From a Wall Street Journal review by Moira Hodgson of the book by Tilar J. Mazzeo titled “Sisters in Resistance: How a German Spy, a Banker’s Wife, and Mussolini’s Daughter Outwitted the Nazis”:

At the beginning of World War II Galeazzo Ciano (1903-1944), Italy’s foreign minister under Mussolini, began to keep a secret diary. Part of Hitler’s inner circle, he meticulously wrote down what he heard at meetings with Nazi officials. He recorded details of political squabbles and discussions of Germany’s war strategy. The diaries starkly exposed Nazi war crimes and would be used as crucial evidence in the Nuremberg trials in 1945-46.