Book 1

Worldwar

by Harry Turtledove

Published 21 February 1995

Book 1

Worldwar: In the Balance

by Harry Turtledove

Published 3 November 1994
World War II seethes across the planet. Hostilities spread in ever-widening circles of destruction: Nazi Germany, Soviet Russia, Britain, France, Japan, Italy Africa - the fate of the world hung in the balance. Then the real enemy arrives. Out of the skies comes an invasion force the like of which Earth has never known - and worldwar is truly joined. The invaders are inhuman and they are unstoppable. Their weaponry is overwhelming and their goal is simple: Fleetlord Atvar has arrived to claim Earth for the Empire. 'The wizard of If.' Chicago Sun-Times 'The standard-bearer for alternate history.' USA Today

Book 2

Tilting the Balance

by Harry Turtledove

Published 30 December 1995
While Stalin, Churchill, Roosevelt, and Togo worked out their strategy, the war against an even greater enemy continued . . . 

They cut the United States in two.
They devastated much of Europe.
They had a ferocious agenda.
And no one could stop them.

World War II screeched to a halt as the Russians, Germans, Americans, and Japanese scrambled to meet an even deadlier foe.

In Warsaw, Jews welcomed the invaders as liberators, only to be cruelly disillusioned. In China, the Communist guerrillas used every trick they knew. In America, Washington, D.C., was vaporized in a matter of seconds.

But humanity would not give up—whether delivering supplies in tiny biplanes to partisans across the vast steppes of Russia, working furiously to understand the enemy’s captured radar in England, or battling house to house on the streets of Chicago. . . . 

As Turtledove’s global saga of alternate history continues, humanity grows more resourceful, even as the menace worsens. No one could say when the hellish inferno of death would stop being a war of conquest and turn into a war of survival—a war for the survival of the planet.

Book 3

Upsetting the Balance

by Harry Turtledove

Published 21 March 1996
Russia, Communist China, Japan, Nazi Germany, the United States: they began World War II as mortal enemies. But suddenly their only hope for survival—never mind victory—was to unite to stop a mighty foe—one whose frightening technology appeared invincible.

Far worse beings than the Nazis were loose. From Warsaw to Moscow to China's enemy-occupied Forbidden City, the nations of the world had been forced into an uneasy alliance since humanity began its struggle against overwhelming odds. In Germany, where the banshee wail of hostile jets screamed across the land, caches of once-forbidden weapons were unearthed, and unthinkable tactics were employed against the enemy. Brilliantly innovative military strategists confronted challenges unprecedented in the history of warfare.

Even as lack of fuel forced people back to horse and carriage, physicists worked feverishly to create the first nuclear bombs—with horrifying results. City after city joined the atomic pyre as the planet erupted in fiery ruins. Yet the crisis continued—on land, sea, and in the air—as humanity writhed in global combat. The tactics of daredevil guerrillas everywhere became increasingly ingenious against a superior foe whose desperate retaliation would grow ever more fearsome.

No one had ever put the United States, or the world, in such deadly danger. But if the carnage and annihilation ever stopped, would there be any pieces to pick up?

Book 4

Striking the Balance

by Harry Turtledove

Published 1 January 2002

Book 4

When alien beings armed with devastatingly superior military technology and bent on conquest invaded earth, Allied and Axis forces were already engaged in a bloody conflict - the Second World War - that spanned the whole globe. Suddenly, humans had to stop fighting each other and unite against this deadly new enemy from beyond the Solar System.

From China to North Africa, from hit-and-run cavalry raids in the American West to tank clashes in Eastern Europe, the worldwide conflict raged. Now battlefield defeats, supply shortages, guerrilla warfare in their occupied territories, rebellion within their own ranks and atomic attacks forced the alien leaders to rethink drastically their strategy and tactics. Was it going to be necessary to destroy Earth in order to save it . . . ?