John P. Kotter is internationally regarded as the foremost authority on the topics of leadership and change. His is the premier voice on how the best organizations achieve successful transformations.

Kotter is the Konosuke Matsushita Professor of Leadership, Emeritus, at Harvard Business School and is cofounder of Kotter International, a leadership organization that helps Global 5000 company leaders accelerate the implementation of their most critical strategies and lead change in a complex, fast-moving business environment.

John Kotter has authored eighteen books, twelve of them bestsellers. His works have been printed in over 150 foreign language editions.

Michael E. Porter is the Bishop William Lawrence University Professor at Harvard Business School. He was named a University Professor by Harvard's president in 2000. Porter is the author of nineteen books, including Competitive Strategy, Competitive Advantage, The Competitive Advantage of Nations, On Competition, and Redefining Health Care, as well as countless articles in both scholarly and nonscholarly publications. He lives in Boston.