Enneagram Resources 

The Change Works
www.thechangeworks.com
This is the site of Tom Condon, a popular Enneagram author and teacher. Lots of detailed information about the types, as well as information about his excellent audio CD’s on a variety of Enneagram topics.

Enneagram Central
www.enneagramcentral.com
Clarence Thomas has out together a site with lots of free information, and a wealth of links to other Enneagram resources. There’s even a free home study course about the Enneagram.

The Enneagram Institute
www.enneagraminstitute.com
Created by Don Riso and Russ Hudson, best-selling Enneagram authors. This site has information about the types, history of the Enneagram, and free and low-cost personality typing tests. There is also information about their many books. 

Enneagram Monthly
www.ideodynamic.com/enneagram-monthly
A monthly publication featuring contributed articles by popular teachers as well as Enneagram enthusiasts. 

International Enneagram Association
www.internationalenneagram.org
This organization produces an annual conference, publishes a quarterly journal, and hosts a Web site. 

Books

• The Enneagram, Understanding Yourself and the Others in Your Life, by Helen Palmer

• The Enneagram of Liberation, from Fixation to Freedom, by Eli Jaxon-Bear

• The Essential Enneagram, the Definitive Personality Test and Self-Discovery Guide, by David Daniels, MD and Virginia Price, MD

• The 9 Ways of Working, How to Use the Enneagram to Discover Your Natural Strengths and Work More Effectively, by Michael J. Goldberg

• The Wisdom of the Enneagram, the Complete Guide to Psychological and Spiritual Growth for the Nine Personality Types, by Don Riso and Russ Hudson

For those who want a more detailed understanding of the psycho-dynamics behind the types, see the writings of Claudio Naranjo, MD, the "father" of the modern Enneagram. He has published numerous books including Character and Neurosis, an Integrative View.