Found this one last year in this shop when I was in Dublin. Having highlighted about half of it with that light blue colored pencil of mine, it took me about a year to “finish”… Reference book or no, I was really attracted to the way it expanded on some of the concepts first laid out in Personality Types. I recommend reading that one first (or maybe even The Complete Enneagram: 27 Paths to Greater Self-Knowledge by Beatrice Chestnut for a different school of thought) if you want to get into the Enneagram, and read this one for more models and, uh, experimental ways to use this tool for personal growth and helping others out.
The Enneagram is a valuable piece of social technology — it’s a tool that can help us understand others and ourselves that works. We need to spread the word!