Leviathan Falls by James S. A. Corey (The Expanse, Book Nine)
Well, Daniel Abraham and Ty Franck pulled it off. After nine books, they wrapped up The Expanse in a way that’s both very fitting and rewarding, but also leaves behind some interesting ethical/philosophical questions about the character’s actions. And I appreciate how the book jumps back and forth between cynicism and optimism concerning humanity right up until the final pages.