The Last Colonist

Two hundred colonists flee a dying world—and one engineer wakes up alone on the surface with nineteen days until a gamma-ray burst sterilizes everything above ground. Lukas Solano has food, water, and power enough for a small city, but no ship, no rescue, and no shielding capable of surviving what's coming. Buried beneath the colony lies a sealed bunker and an abandoned AI core that might save more than just his life—if he can reach them in time.