Rohr is the most common name associated with the enneagram, and I was looking forward to reading his take on the whole personality type system. This book is dense, but it's brilliant and helpful and so, so good. I didn't read this one cover to cover (mostly just all the really fascinating introductory material, the chapter on my type, and all the really really intriguing deeper theories and thoughts about the subtleties of the types found toward the end!) but it's one I highly recommend, for sure.