Han har siden udgivet adskillige bøger og artikler, herunder Special Operations in the Age of Chivalry, 1100–1550; The Ultimate Experience: Battlefield Revelations and the Making of Modern War Culture, 1450–2000; The Concept of 'Decisive Battles' in World History; og  Armchairs, Coffee and Authority: Eye-witnesses og Flesh-witnesses Speak about War, 1100–2000.