scifi
Project Hail Mary, by Andy Weir
https://andyweirauthor.com/#project-hail-mary
Andy Weir is the New York Times bestselling author of The Martian, Artemis, Project Hail Mary, and Cheshire Crossing.
Time Travel for Beginners, by Jaclyn Moriarty
https://jaclynmoriarty.com/books/time-travel-for-beginners/