As Turtledove's brilliant series The Great War came to its end, the United States of America, in alliance with Germany, had defeated Great Britain, France and the Confederate States of America in a bloody conflict known as the first World War.
As the 1920s begin, though, the seeds of a new conflict have alredy been sown. The United States, led by Theodore Roosevelt, swings wildly towards socialism. In Canada - now a US colony - nationalist terrorists strike against the new American oppressors. But it is in the Confederacy, trapped in a ruinous economic depression, where fascism begins to spread, and the fires are fanned by a charismatic leader who may again plunge the world into war.

'The wizard of If.' Chicago Sun-Times
'The standard-bearer for alternate history.' USA Today