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. Dan S. Cohen is the CEO of Stuart Advisory Services Group and a retired partner of Deloitte Consulting LLP. He focuses on large-scale organizational transformation and strategic change, and has over thirty-five years of experience consulting to and working in industry. During his fifteen years at Deloitte, Cohen developed the firm's first Global Change Leadership methodology and was the lead architect in the design of Deloitte's Strategic Change methodology. In addition to his consulting work, Cohen has lectured on organizational behavior at Ohio State University, Miami University, the University of Detroit, and Southern Methodist University.