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Books by Riso and Hudson (The Enneagram Institute):

  • The Wisdom of the Enneagram: The Complete Guide to Psychological and Spiritual Growth for the Nine Personality Types, by Don Richard Riso and Russ Hudson (1999)

  • Personality Types: Using the Enneagram for Self-Discovery, by Don Richard Riso with Russ Hudson (1996)

  • Understanding the Enneagram: The Practical Guide to Personality Types, Revised Edition, by Don Richard Riso and Russ Husdon (2000)

  • Enneagram Transformations: Releases and Affirmations for Healing Your Personality Type, by Don Richard Riso (1993)  


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Books by Palmer and Daniels (The Narrative Enneagram):

  • The Enneagram: Understanding Yourself and the Others in Your Life, by Helen Palmer (1991)

  • The Enneagram in Love & Work: Understanding Your Intimate & Business Relationships, by Helen Palmer (1995)

  • The Essential Enneagram: The Definitive Personality Test and Self-Discovery Guide, by David Daniels, M.D. and Virginia Price, Ph.D. (2009)

  • The Enneagram, Relationships and Intimacy: Understanding One Another Leads to Loving Better and Living More Fully, by David Daniels, M.D. and  Suzanne Dion (2018)


Website: (Helen Palmer's website)

Website: (Dr. David Daniel's website)

Website: (Peter O'Hanrahan's website)

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Books by Ginger Lapid-Bogda, Ph.D.  (The Enneagram in Business): (Excellent for organizational applications)

  • The Art of Typing: Powerful Tools for Enneagram Typing, by Ginger Lapid-Bogda, Ph.D. (2018)

  • Bringing Out the Best of Yourself at Work: How to Use the Enneagram System for Success, by Ginger Lapid-Bogda, Ph.D. (2004)

  • What Type of Leader are You: Using the Enneagram to Identify and Grow Your Leadership Strengths and Achieve Maximum Success, by Ginger Lapid-Bogda, PhD. (2007)



Books by Beatrice Chestnut, Ph.D.

  • The Complete Enneagram: 27 Paths to Greater Self-Knowledge, by Beatrice Chestnut, Ph.D. (2013)

  • The 9 Types of Leadership: Mastering the Art of People in the 21st Century Workplace, by Beatrice Chestnut, Ph.D. (2017)


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Books from the Diamond Approach® perspective:

  • The Spiritual Dimension of the Enneagram: Nine Faces of the Soul, by Sandra Maitri (2000)

  • The Enneagram of Passions and Virtues: Finding the Way Home, by Sandra Maitri (2005)

  • Facets of Unity: The Enneagram of Holy Ideas, by A.H. Almaas (2000)

  • Keys to the Enneagram: How to Unlock the Highest Potential of Every Personality Type, by A.H. Almaas (2021)

Website: (Sandra Maitri)

Website: (A.H. Almass)


Books by Susan Rhodes:

  • Archetypes of the Enneagram: Exploring the Life Themes of the 27 Enneagram Subtypes from the Perspective of Soul, by Susan Rhodes (2010)

  • The Integral Enneagram: A dharma-oriented approach for linking the nine personality types, nine stages of transformation & Ken Wilber's Integral Operating System, by Susan Rhodes (2013)

  • The Positive Enneagram: A New Approach to the Nine Personality Types, by Susan Rhodes (2009)


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