Extinction Engine

Forty-seven hidden satellites are steering a planet-killing asteroid straight at Earth—and the clock reads six months. Astronomer Patricia Hughes must dismantle an impossible conspiracy engineered by Dr. Alan Fowler, a once-brilliant physicist shattered by personal tragedy and now convinced that obliterating all life is an act of mercy. With each satellite she destroys, Fowler reveals another failsafe. The sky Patricia has spent her career studying may soon be the last thing anyone sees.