How to read Project Hail Mary for cheap (or free) before the movie comes out

Ryland Grace wakes up on a spaceship with no idea who he is. He doesn’t know his name, why he’s there, or who the two corpses were that didn’t wake up when he did. When his memories slowly come back, he remembers the mission: to save the world. And despite what he thinks at first, he may not be as alone as he believes.