* "Stalin: The Court of the Red Tsar" (2007)
* "The Reich Ministry of Finance" (2007)
* "Mussolini: The Facts" (2007)
* "The Gestapo: Power and Terror in the Nazi Germany" (2010)
* "The Italian Army in the Great War 1915-1918: Strategy, Tactics, and Campaigns" (2014)
* "The Rise of the Reich: The German Army 1918-1938" (2015)
* "The Wehrmacht: The German Army in World War II" (2016)
Fiction:
* "Death in Florence" (2019)
* "Murder in Florence" (2019)
* "The Secret of Dante" (2019)