Books

1. The Complete Enneagram: 27 Paths to Greater Self-Knowledge. Beatrice Chestnut. Goodreads. 
2. The Sacred Enneagram: Finding Your Unique Path to Spiritual Growth. Christopher L. Heuertz. Goodreads. 
3. Personality Types: Using the Enneagram for Self-Discovery. Don Richard Riso. Goodreads.
4. Character and Neurosis: An Integrative View. Claudio Naranjo. Goodreads.
5. The Spiritual Dimension of the Enneagram: Nine Faces of the Soul. Sandra Maitri. Goodreads.
6. The Wisdom of the Enneagram: The Complete Guide to Psychological and Spiritual Growth for the Nine Personality Types. Don Richard Riso & Russ Hudson. Goodreads.