PROJECT HAIL MARY (PB)

Ryland Grace is the sole survivor on a last-chance mission - if he fails, humanity and the earth itself will perish. Except that right now, he doesn't know that. He can't remember his own name, let alone his assignment or how to complete it. All he knows is that he's been asleep for a very, very long time. His crewmates dead, his memories fuzzily returning, Ryland realizes that an impossible task now confronts him. Hurtling through space on this tiny ship, it's up to him to puzzle out an impossible scientific mystery-and conquer an extinction-level threat to our species.