The Plot Against America by Philip Roth

One of the New York Times’s 100 Best Books of the 21st Century

In an extraordinary feat of narrative invention, Philip Roth imagines an alternate history where Franklin D. Roosevelt loses the 1940 presidential election to heroic aviator and rabid isolationist Charles A. Lindbergh. Shortly thereafter, Lindbergh negotiates a cordial "understanding" with Adolf Hitler, while the new government embarks on a program of folksy anti-Semitism.