The Leadership Challenge—the most trusted source on becoming a better leader—has been thoroughly updated and revised for a new generation of leaders living and working in a global environment. Building on the knowledge base of the previous books, the fourth edition is grounded in research and presents extensive interviews with a diverse group of leaders at all levels in a wide variety of organizations from around the world. The authors emphasize that the fundamentals of leadership are not a fad. While the context of leadership has changed dramatically, the content of leadership has endured the test of time.