- The Operational Art: Developments in the Theories of War
- Esme Howard: A Diplomatic Biography
- The Second Baldwin Government and the United States, 1924-1929: Attitudes and Diplomacy (International Studies)
- Transition of Power: Britain's Loss of Global Pre-eminence to the United States, 1930-1945
- Anglo-American Relations in the 1920s: The Struggle for Supremacy