Project Hail MaryProject Hail Mary

The sole survivor on a desperate, last-chance mission to save both humanity and the earth, Ryland Grace is hurtled into the depths of space when he must conquer an extinction-level threat to our species.
Ryland Grace has been asleep for a very, very long time. He's just been awakened to find himself millions of miles from home, with nothing but two corpses for company. He can't remember his own name, let alone the nature of his assignment or how to complete it. Alone on this tiny ship that's been cobbled together by every government and space agency on the planet and hurled into the depths of space, it's up to him to conquer an extinction-level threat to our species. And thanks to an unexpected ally, he just might have a chance. -- adapted from jacket