Peter G. Northouse, PhD, is Professor Emeritus of Communication in the School of Communication at Western Michigan University. Leadership: Theory and Practice is the best-selling academic textbook on leadership in the world and has been translated into 15 languages. In addition to authoring publications in professional journals, he is the author of Introduction to Leadership: Concepts and Practice (now in its sixth edition) and co-author of Leadership Case Studies in Education (now in its fourth edition) and Health Communication: Strategies for Health Professionals (now in its third edition). His scholarly and curricular interests include models of leadership, leadership assessment, ethical leadership, and leadership and group dynamics. For more than 40 years, he has taught courses in leadership, interpersonal communication, and organizational communication on both the undergraduate and graduate levels. Currently, he is a consultant and lecturer on trends in leadership research, leadership development, and leadership education. He holds a doctorate in speech communication from the University of Denver, and master's and bachelor's degrees in communication education from Michigan State University.