I was disappointed with this book and feel the writer missed a perfect opportunity to help 'lay' people understand personalities and in so doing to be able to manage relationships better. I felt he made it far too complicated with too many tests to do. I have, in the course of my Psychotherapy career and training, been on various courses that have helped me understand my own and other personalities which have in turn changed my way of looking at relationships both personally and professionally. In this book my personality was so complicated in it's analysis I was confused about myself for the first time in years! Fortunately I know who I am, but I feel sorry for anyone who hopes this book may help them find themselves.