The Pope at War: The Secret History of Pius XII, Mussolini, and Hitler (Unabridged)
2022
The Pope and Mussolini: The Secret History of Pius XI and the Rise of Fascism in Europe (Unabridged)
2014
The Popes Against the Jews: The Vatican's Role in the Rise of Modern Anti-Semitism (Unabridged)
2021
The Kidnapping of Edgardo Mortara (Unabridged)
2016
The Pope Who Would Be King: The Exile of Pius IX and the Emergence of Modern Europe (Unabridged)
2018
O papa e Mussolini: A conexão secreta entre Pio XI e a ascensão do fascismo na Europa (Unabridged)
2023