Personality Types: Using the Enneagram for Self-DiscoveryAn expanded edition of Don Riso's revoluntionary interpretation of the Enneagramthe ancient psychological system used to understand the human personality. This expanded edition of Don Riso's classic for the first time uncovers the Core Dynamics, or Levels of Development, within each type. This skeletal system provides far more information about the inner tension and movements of the nine personalities than has previously been published. This increased