John Kotter has been on the faculty at Harvard Business School since 1972. He is the author of eleven award-winning titles and frequently gives speeches and seminars at Harvard and around the world. He lives in Cambridge, Massachusetts. Holger Rathgeber spent his early professional career in Asia. He has worked in industry since the early 1990's and is now with one of the leading medical technology companies, Bectom Dickinson. Raised in Frankfurt, Germany, Rathgeber currently resides in White Plains, New York.