John Kotter is the Konosuke Matsushita Professor of Leadership, Emeritus, at the Harvard Business School and the founder of Kotter International. He is a world-renowned authority on leadership and change. A New York Times bestselling author, his work includes the acclaimed Leading Change and The Heart of Change. His books have sold over three million copies and have been translated into more than 150 languagesHolger Rathgeber is a former Fortune 500 company executive. He has his own consulting practice, Team Rathgeber. His co-authored books with John Kotter include Our Iceberg Is Melting and That's Not How We Do It Here.Together they are the authors of the classic business fable Our Iceberg Is Melting.