This book is to be used in conjunction with Dr. Jerome Wagner's basic introduction to the Enneagram titled, "The Enneagram Spectrum of Personality Styles: An Introductory Guide." Therefore this can be used by beginners who have never encountered the Enneagram. It can also be used by spiritual directors, counselors, businesses, and other professionals. This book is for anyone interested in improving their relationships with God, themselves, and others..