The Space Race of the Sixties, at the height of the Cold War, had been nail-biting—until the Soviet Union forfeited.

In the thirties—amid a second Cold War—China is not about to lose the race to Mars. Nor is the United States. Nor, quite the wildcard, is a secretive cabal drawn from among the world's multi-billionaires. All of them scrambling to launch deep-space missions on a schedule to make the Sixties contest appear lackadaisical.

Competition that could only continue on the Red Planet.

More treacherous still? The rivalries, resentments, and distrust that simmer just beneath the surface within each expedition.

More difficult yet? Survival on that arid, radiation-drenched, all-but-airless, planet.

These challenges have somehow fallen into the lap of NASA engineer—and reluctant astronaut—Xander Hopkins.

But the thorniest problem of all? The existential quandary for which neither training nor experience has in any way prepared Xander? Making sense of the seemingly unstoppable plague that has already killed. The plague that seems poised to devastate all life on Mars and another world.

Earth.