Proyecto Hail Mary

Ryland Grace wakes with tubes in his arms, alarms ringing, and two dead crewmates beside him, millions of miles from home. He cannot remember his name, how he got aboard the tiny ship, or why he was put into a coma for years. Then memory returns in flashes: he is a middle-school science teacher turned reluctant astronaut, sent on a last-chance mission to save Earth as its sun mysteriously dims. The physics does not add up, his supplies are limited, and the nearest human is light-years away. To stop an extinction, he must solve an impossible puzzle with only his wits, his science, and a ship built for no return.