Alien Invasion and Earth's Response

Alien invaders from another star system have attacked the Earth, wreaking massive destruction and havoc with their terrifyingly advanced military technology. Humans are forced to unearth secret caches of terrible, once-forbidden weapons. Hitherto unthinkable tactics are brought into action against the alien enemy.

Desperate Measures and Scientific Efforts

Even as fuel shortages force people back to the horse and cart, the world's scientists work desperately to create Earth's first atom bombs - with horrific results. If the carnage and slaughter ever stop, will there be any pieces to pick up?

Reviews

The wizard of If. Chicago Sun-Times

The standard-bearer for alternate history. USA Today