‘It could be one of the best books on Psychological Types ever written, and though a bit more cerebral than the usual reader of the typology literature might be used to, it would still be important to own, and thus likely to be purchased by that sort of reader (of whom there are many).’ – John Beebe, C. G. Jung Institute of San Francisco.‘I would say that this is a ‘must publish’ book. It is quite simple the best thing I’ve ever seen on Jung’s theory of psychological types. I can see translation possibilities and a rather wider penetration of the clinical and scholarly market than with previous works on this theme.’ – Andrew Samuels, University of Essex.