Ken Blanchard is founder and chief spiritual officer of the Ken Blanchard Companies and is one of the world's most prominent authors, speakers, and consultants. He is the author or coauthor of more than sixty books. Mark Miller is currently serving as vice president, organizational effectiveness, at Chick - fil - A, Inc. He is also the author of The Heart of Leadership, The Secret of Teams, and, with Ken Blanchard, Great Leaders Grow. His blog, GreatLeadersServe.org, is rated as one of the top leadership sites in the world. John C. Maxwell is an author, speaker, and pastor who has written more than 60 books including The 21 Irrefutable Laws of Leadership.