The Wisdom of the Enneagram, The Complete Guide to Psychological and Spiritual Growth for the Nine Personality Types Don Richard Riso and Russ Hudson
Understanding the Enneagram, the practical guide to personality types Don Richard Riso and Russ Hudson
The Enneagram, Relationships and Intimacy, Understanding one another leads to loving better and living more fully David Daniels, M.D., Suzanne Dion
The Essential Enneagram, The Definitive Personality Test and Self-Discovery Guide David Daniels, M.D., Virginia Price, PH.D.
