Facets of Unity: The Enneagram of Holy Ideas

The Spiritual Dimension of the Enneagram: Nine Faces of the Soul

The Enneagram of Passions and Virtues: Finding the Way Home

The Pearl Beyond Price: Integration of Personality into Being, an Object Relations Approach

The Unfolding Now: Realizing Your True Nature through the Practice of Presence

The Complete Enneagram: 27 Paths to Greater Self-Knowledge

Understanding the Enneagram: The Practical Guide to Personality Types