H.W. Brands's book 'America First: Roosevelt vs. Lindbergh in the Shadow of War' explores the debates preceding the US entry into World War II. The book focuses on Franklin Roosevelt and Charles Lindbergh, examining their opposing views on war and their impact on American society. Brands highlights Lindbergh's support for Nazi Germany and his belief in a bond of race rather than political ideology. The book also delves into Roosevelt's efforts to steer the US towards war and his use of propaganda to shape public opinion. Overall, 'America First' provides a detailed analysis of the complex political landscape leading up to World War II.