So, it is with a certain trepidation that I approach any book on the subject of the Enneagram, as the "signal to noise" is getting more staticky every passing year. Unfortunately, Don Richard Riso's Understanding the Enneagram: The Practical Guide to Personality Types does not disabuse me of the disdain I hold most of the works in this genre. You might well ask why I picked up this book ... and I can only say that it's been sitting around in the "to be read" boxes for nearly 20 years, was a bookclub edition, and probably seemed like a thing I'd enjoy reading back in the days when I could afford to buy books without a lot of discrimination!
In Riso's defense, his approach is not "newspaper horoscope", but neither does it take into account the systemic elements of Enneagram work. He all but admits the failings of this book, begging off on the history of the Enneagram, and on the "abstract theoretical aspects". Rather, he presents this as an expansion, and "practical guide" to the material he published in a previous book, Personality Types.
In this he deals with nine "personality types": 1 - The Reformer, 2 - The Helper, 3 - The Motivator, 4 - The Artist, 5 - The Thinker, 6 - The Loyalist, 7 - The Generalist, 8 - The Leader, and 9 - The Peacemaker. Each of these nine types are subject to "nine levels of development": 1 - Liberation, 2 - Psychological Capacity, 3 - Social Value, 4 - Imbalance, 5 - Interpersonal Control, 6 - Overcompensation, 7 - Violation, 8 - Delusion and Compulsion, and 9 - Pathological Destructiveness. This gives him 81 type/levels to play with in his descriptions. He also talks about "wings", sub-types on either side of one's "type", which (depending on dominance) provide a whole additional layer of combinations to write about. In addition to this there are "misidentifications" where somebody thinks they're one type when they're actually another, and how one type at one level can look like quite another type at some other level. Again, a lot of "stuff" but not necessarily very much "content".
While it ultimately might be on the level of your typical internet meme, the most interesting part of the book was the self-assessment questionnaire which is comprised of 20 "statements" for each of the 9 types, you go through and mark down which of these 180 items you "agree" or "strongly agree" with. Your main "type" should have fifteen or more of these. Interestingly, my results cooperated, with 17 for Type 5, 11 for Type 6, and 9 for Type 4, showing a primary type with its two "wings", while the others ranged from 1-6 (with a mean of 3). This suggests that Riso is perhaps onto something, although having my results pointing to "The Thinker" might be clouding my perceptions.
Again, I believe that Riso is trying to present something of value, but has "lost the key" in following the non-Gurdjieffian versions of the Enneagram work. I kept being frustrated by his "brushing off" the questions of theory, as I would have been more interested in reading about that than the various factors ("Childhood Origins", "Basic Fear", "Basic Desire", "Secondary Motivations", "Healthy Sense of Self", "Hidden Complaint", "Key Defense Mechanisms", "Characteristic Temptation", "Characteristic Vice", "Characteristic Virtue", and "Saving Grace") that he spins out for the various types here.
While I really can't endorse this book, it's also not the worst of its kind, and has its moments. I'd just have preferred reading the book that Riso says he can't write! If this sounds like something you'd be interested in, however, you're in luck as it can be had for cheap ... the Amazon new/used guys have "very good" copies for 1¢ and up, and "new" copies for as little as 58¢ (plus shipping, of course).