"21 Lessons for the 21st Century" by Yuval Noah Harari is a comprehensive nonfiction book that delves into various aspects of modern society. Published in 2018 by Random House Publishing Group, this hardcover book spans 400 pages and covers a range of topics including history, social science, and political science. With a focus on civilization, the book offers insights into contemporary issues and challenges. Aimed at an adult audience, this book by Harari is a thought-provoking read for those interested in understanding the complexities of the 21st century."