Co-author, World History, compact 4th ed. (Belmont, Calif.: Thomson/Wadsworth, 2005).

Kitchener’s War: British Strategy from 1914 to 1916 (Washington, D.C.: Brassey’s, 2004).

The Forgotten Front: The British Campaign in Italy, 1917-1918 (London: Hambledon Press, 1998).

Asquith as War Leader (London: Hambledon Press, 1994).

Beyond Courage: The Canadians at the Second Battle of Pyres (Ottawa, Ont.: Oberon Press, 1985).

The Tragedy of Sir John French (Newark: University of Delaware Press, 1985).

Kitchener: Architect of Victory (London: Kimber, 1977).

The French and the Dardanelles: A Study of Failure in the Conduct of War (London: Allen and Unwin, 1971).