The fourth and final title in Mary Robinette Kowal’s Lady Astronaut series. Previous novels in this series have won the Nebula, Locus and Hugo Awards.

Years after a meteorite strike obliterated Washington, D.C. — triggering an extinction-level global warming event — Earth’s survivors have started an international effort to establish homes on space stations and the Moon.

The next step – Mars.

Elma York, the Lady Astronaut, lands on the Red Planet, optimistic about preparing for the first true wave of inhabitants. But from the moment she arrives, something is off.

Disturbing signs hint at a hidden disaster during the First Mars Expedition that never made it into the official transcript. As Elma and her crew try to investigate, they face a wall of silence and obfuscation.

What you don’t know CAN harm you. And if the truth doesn’t come to light, the ripple effects could leave humanity stranded on a dying Earth…