Don Richard Riso, M.A., is the most widely published and the bestselling author of books on the Enneagram. This is the revised and expanded edition of the classic on understanding the human personality--more than 150,000 copies sold! In addition to updating the descriptions of the nine personality types, this book uncovers the Core Dynamics, or Levels of Development, within each type Authors' Note xi Preface xvii Acknowledgments xxi PART I Understanding Personality Types 3(8) Origins 11(16) Guidelines 27(32) PART II THE NINE PERSONALITY TYPES The Feeling Triad Type Two: The Helper 59(36) Type Three: The Motivator 95(39) Type Four: The Individualist 134(39) The Thinking Triad Type Five: The Investigator 173(43) Type Six: The Loyalist 216(43) Type Seven: The Enthusiast 259(38) The Instinctive Triad Type Eight: The Leader 297(41) Type Nine: The Peacemaker 338(38) Type One: The Reformer 376(37) PART III Advanced Guidelines 413(18) The Theory of the Enneagram 431(24) Postscript 455(10) Appendix 465(30) Bibliography 495(4) Index 499