First published in 1964, it is divided into five parts, four of which were written by associates of Jung: Marie-Louise von Franz, Joseph L. Henderson, Aniela Jaffé, and Jolande Jacobi.

The book, which contains numerous illustrations, seeks to provide a clear explanation of Jung's complex theories for a wide non-specialist readership.

Two factors then came into play, which led Jung to finally accept the offer: the unusual abundance of mail he received as a result of the BBC show as well as a dream he had, in which he addressed a crowd listening attentively.

When Foges asked Jung, a week later, he responded favorably but posed two conditions: that the book be written with some of his collaborators and that Freeman ensure its coordination.

Abundantly illustrated, the book consists of five parts: Jung finished his chapter barely ten days before the onset of the illness that led to his death (this is his very last article) and after he had approved the draft of his collaborators.