This book is an able summary of Jung's psychology, very readably translated. The author has achieved the aim set out in the introduction, namely 'to give a concise picture, complete in itself, of the central content of the whole system, and above all to facilitate access to Jung's own extraordinarily voluminous works.' (p. ix.) Jung himself has written an appreciative Foreword, in the course of which he says: 'It is a particular satisfaction to me that the author has been able to avoid furnishing any support to the opinion that my researches constitute a dogmatic system. … I regard my theories as suggestions and attempts at the formulation of a new scientific concept of psychology based in the first place upon immediate experience with human beings.' (pp. vii, viii.)

The main part of the book is divided into three sections, two theoretical and one practical: I, Nature and Structure of the Psyche; II, Laws of the Psychic Processes and Operations; and III,