Three Days of Air

When humanity’s first colony on a distant planet loses its oxygen system, engineer Wren Vance has just 72 hours to keep five people alive—with rescue a year away. Armed with a battered multitool and a founder’s hand-drawn map, she must rebuild their failing world from scraps, sacrificing one vital system to save another. But as the months-long Long Night closes in, dwindling resources and rising panic may tear them apart before the planet does.