Project Hail Mary

Science teacher Ryland Grace wakes up on a spaceship light years from home, with no memory of who he is or how he got there. As his memory slowly returns, he begins to unravel his mission: To solve the mystery of the mysterious substance that causes the sun to go out. He must call on all his scientific knowledge and unconventional ideas to save everything on Earth from extinction... But an unexpected friendship will mean he won't have to go it alone.