Dan Millman is author of the novel, Way of the Peaceful Warrior, that was made into a motion picture. His other books on the spiritual quest include Wisdom of the Peaceful Warrior, The Life You Were Born to Live, The Four Purposes of Life, Sacred Journey of the Peaceful Warrior, Everyday Enlightenment, Body Mind Mastery, and most recently Peaceful Heart Warrior Spirit: The True Story of My Spiritual Quest. His website is https://www.peacefulwarrior.com/