Pope Pius XII, the head of the Catholic Church during World War II, engaged in secret negotiations with Nazi leader Adolf Hitler through an intermediary, in the hope of reconciling the Church with the Third Reich, a new book has revealed. The significant new revelations about Pius’ relationship with the Nazi regime contained in “The Pope at War: The Secret History of Pius XII, Mussolini and Hitler,” by the American historian David Kertzer, are based on research in the wartime archives of the Vatican, which were first made available to scholars in March 2020. Scathingly described by critics as “Hitler’s...