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Turtledove, Harry. Hitler's War. Ballantine/Del Rey 2009.

Turtledove, Harry. The War that Came Early
Divergence: 1938 CE
What if: World War II broke out a year earlier, over Czechoslovakia rather than Poland.
Series note: Series including Hitler's War, West and East, The Big Switch, Coup d'Etat, Two Fronts, and Last Orders.

Turtledove, Harry. Hitler's War [vt The War that Came Early: Hitler's War]
Divergence: 1938 CE
Series note: First volume of The War that Came Early.
Published: Del Rey 2009 (0345491823BUY), 2010 (0345491831BUY); and Hodder & Stoughton 2009 (0340921811), 2010 (034092182X).
Publication note: Was apparently briefly called Appeasement by its UK publisher prior to publication.

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Turtledove, Harry. West and East. Del Rey 2010.

Turtledove, Harry. The War That Came Early: West and East
Divergence: 1938 CE
Series note: Second volume of The War that Came Early.
Published: Del Rey 2010 (034549184XBUY), 2011 (0345491858BUY).

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Turtledove, Harry. The Big Switch. Del Rey 2011.

Turtledove, Harry. The War That Came Early: The Big Switch
Divergence: 1938 CE
Series note: Third volume of The War that Came Early.
Published: Del Rey 2011 (0345491866BUY), 2012 (0345491874BUY).

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Turtledove, Harry. Coup d'Etat. Del Rey 2012.

Turtledove, Harry. The War That Came Early: Coup d'Etat
Divergence: 1938 CE
Series note: Fourth volume of The War that Came Early.
Published: Del Rey 2012 (0345524659BUY).

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Turtledove, Harry. Two Fronts. Del Rey 2013.

Turtledove, Harry. The War That Came Early: Two Fronts
Divergence: 1938 CE
Series note: Fifth volume of The War that Came Early.
Published: Del Rey 2013 (0345524683BUY), 2014 (0345524691BUY).

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Turtledove, Harry. The War That Came Early: Last Orders. Del Rey 2014.

Turtledove, Harry. The War That Came Early: Last Orders
Divergence: 1938 CE
Series note: Sixth volume of The War that Came Early.
Published: Del Rey 2014 (0345524713BUY).