Three-time Hugo Award-winning author Allen Steele imagines an alternate history rooted in an actual historical possibility: What if the race to space had occurred in the early days of World War II?

It's 1941, and Wernher von Braun is ordered by his fuhrer to abandon the V-2 rocket and turn German resources in a daring new direction: construction of a manned orbital spacecraft capable of attacking the United States. When the top secret plan is leaked to Franklin Roosevelt, the president has only one logical response: The United States must build their own spacecraft to destroy it. Robert Goddard, inventor of the liquid-fuel rocket, agrees to head the classified project.

So begins a race against time between two secret military programs and two brilliant scientists whose high-stakes competition will spiral into a deadly game of political intrigue and unforeseen catastrophes played to the death in the brutal skies above America.