We are incredibly grateful to several people who have helped us shape this book. The authors are very appreciative of the assistance of Karen McDonald from the University of Toronto for her help in preparation and review of all of the chapters. Also we wish to thank Amy Cunningham from the ABIM Foundation for her review of the manuscript and her contribution to the chapter on organizational professionalism. Daniel Wolfson, Executive Vice President and Chief Operating Officer, ABIM Foundation, encouraged us to write it in the first place. Our excellent chapter reviewers included Dr. Ayelet Kuper, Dr. Kaveh Shojania, Dr. Lynfa Stroud, Dr. Bob Wachter, Dr. Adina Weinerman, Dr. Brian Wong, and medical students, Marisa Leon, Sabrina Nurmohamed, and Raman Srivastava.