By Don Richard Riso and Russ Hudson

• The Wisdom of the Enneagram – my all-time favorite
• Personality Types
• Understanding the Enneagram
• Enneagram Transformations

By Sandra Maitri

• The Spiritual Dimension of the Enneagram
• The Enneagram of Passions and Virtues

By Elizabeth Wegele & Renee Baron

• The Enneagram Made Easy – a sweet book to introduce and share with friends or family

By Bergohef & Bell

• The Modern Enneagram

By Suzanne Stabile

• The Path Between Us 

By Beatrice Chestnut PhD

• The Complete Enneagram