"For lovers of Andy Weir's The Martian, here's a true hard-science-fiction tale set on the red planet -- a terrific blend of high tech and high tension, of science and suspense, of character and crisis." -- Robert J. Sawyer, Hugo Award-winning author of Red Planet Blues

"Post-apocalyptic disaster meets fractured utopian space exploration in this terrifying tale, which Cawdron (Anomaly) sets in a scientific outpost on Mars . . . This tense cat-and-mouse game plays off fears . . . to satisfying result." -- Publishers Weekly

Venturing into space and traveling to Mars sounds like an exotic adventure, but the reality of living on a rocky, frozen, lifeless planet is exacting on the Mars Endeavour crew. The exhilaration of reaching the surface of Mars has worn off for the public, and the exploration has moved into its scientific phase. The only viable option for long-term habitation lies hundreds of feet beneath the surface, in lava caves that shield humans from harsh cosmic radiation.

Connor, Harrison, and Liz are senior members of the U.S. module. When war breaks out on Earth and rumors spread to Mars, their core principles are rocked by the devastation and loss of friends and family. Whom can you trust on an international mission when your countries are at war? As colonists from different nations struggle to figure out what really happened on Earth, grief and anger become pitted against camaraderie and the spirit of exploration.

"Science fiction as it should be. Retrograde combines realistic characters with depictions of Mars as our explorers will one day find it in a powerful story. A must-read!" -- Ben Bova, Hugo Award winner and author of the Grand Tour series

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