Project Hail Mary

Ryland Grace is the sole survivor on a desperate, last-chance mission - and if he fails, humanity and the earth itself will perish. But right now, he doesn't know that. All he knows is that he's been asleep for a very, very long time, and he's just woken to find himself hurtling through space, millions of miles from home. It's up to him to puzzle out an impossible scientific mystery, and he's got to do it all alone ...
Or does he ?