* The Battle for the Sun: 1939–1941 (2011)
* Operation Sealion: The German Plan to Invade Britain, 1940 (2010)
* The Luftwaffe Raids, 1940 (1996)
Articles
* "The Enigma Code: How It Worked and Why It Was Broken" (2013)
* "The Battle of the Atlantic: The Turning Point of World War II" (2012)
* "The Holocaust: A History of the Genocide of European Jews" (2011)
Other
* Consultant for the BBC documentary series "World War II in Colour" (2009)
* Historical advisor for the film "Dunkirk" (2017)