Debris

A calibration error she introduced the night before launch turns a routine spacewalk into a catastrophe that shreds an entire space station and triggers an orbital cascade. Dr. Marta Rybak—grief-hardened engineer, widow of a man killed by the very kind of failure she swore to prevent—now tumbles through open vacuum with a dying astronaut, no lifeboat, and dwindling oxygen. Their only hope is a crippled supply craft eight kilometres away, and the math to reach it may demand more than numbers alone.