SPY Executive Director Peter Earnest sat down with author Mark Riebling to discuss his new book on the wartime espionage of the Catholic Church. The Vatican’s silence in the face of Nazi atrocities remains one of the great controversies of our time. History has accused wartime pontiff Pius the Twelfth of complicity in the Holocaust and dubbed him “Hitler’s Pope.” But a key part of the story has remained untold. In fact, Pius ran the world’s largest church, smallest state, and oldest spy service. Saintly but secretive, he skimmed from church charities to pay covert couriers, and surreptitiously tape-recorded his meetings with top Nazis. When he learned of the Holocaust, Pius played his cards close to his chest. He sent birthday cards to Hitler—while secretly plotting to kill him. Church of Spies documents this cloak and dagger intrigue in shocking detail. Gun-toting Jesuits stole blueprints to Hitler’s homes. A Catholic book publisher flew a sports plane over the Alps with secrets filched from the head of Hitler’s bodyguard. The keeper of the Vatican crypt ran a spy ring that betrayed German war plans and wounded Hitler in a briefcase bombing.