I often recommend books to clients. Here are a few that I find particularly useful.

• The Power of Now: A Guide to Spiritual Enlightenment

• The Wisdom of the Enneagram: The Complete Guide to Psychological and Spiritual Growth for the Nine Personality Types

• The Enneagram: Understanding Yourself and the Others In Your Life

• Facets of Unity: The Enneagram of Holy Ideas

• Personality Types: Using the Enneagram for Self-Discovery

• Taming your Gremlins

• Soul without Shame