The title of this book, Tertium Organum, boldly refers no less to a reorganization of all knowledge, but it is primarily a study of psychology, more specifically the psychology of our higher mind. For Ouspensky what we can call the higher mind represents, within a single person, the development of an entirely new way of understanding. In short, psychology is the art of self-study. With remarkable scope and sophistication, Ouspensky shows us in this book, which has been hailed as "a work of genius," just how vast and strange our universe really is.

Alfred A. Knopf, 1981.
ISBN: 9780394513508. 298 pp.
Revised translation by E. Kadloubovsky.
Hardcover. Very good in a very good jacket.