The Accretion

Sefu Diallo wakes to screaming alarms on a generation ship carrying twelve thousand sleeping colonists—and discovers he is the only conscious person aboard. Something is growing on the hull, adding mass, dragging the Endurance toward a rogue gas giant that will crush them all. With nine months to solve an impossible problem, Sefu must confront a mystery that reaches back to Earth itself: the ship was never just a ship, and he was never just an engineer.