His books include Storm on the Horizon: The Challenge to American Intervention, 1939-1941; New Deal; From Isolation to War, 1931-1941; A Companion to American Foreign Relations; From Isolation to War: 1931-1941; United States, Europe and Asia, between the World Wars and the Prelude to World War II. Guide to American Foreign Relations since 1700; Debating Franklin D. Roosevelt's foreign policies, 1933-1945; The Presidencies of James A. Garfield and Chester A. Arthur; In Danger Undaunted: The Anti-Interventionist Movement of 1940-1941 As Revealed in the Papers of the America First Committee; The Literature of Isolationism: Non Interventionist Scholarship 1930-1972; The Battle Against Intervention, 1939-1941; and Not to the Swift: The Old Isolationists in the Cold War Era.