Yuval Noah Harari / 21 Lessons for the 21st Century / 9781784708283
21 Lessons for the 21st Century - Yuval Noah Harari. 21 Lessons for the 21st Century Yuval Noah Harari. Author: Yuval Noah Harari. Yuval Noah Harari. '21 Lessons is, simply put, a crucial book' Adam Kay, author ofUndoctored.