Every few years the Bollingen Foundation comes out with a new supplementary volume to The Collected Works of C.G. Jung. The typical addition is like this one: typescript notes of a seminar or seminars worked up for publication, with critical apparati. Like the regular numbered texts of the series, the standards are high, the notes thorough. Unlike the regular series, however, there are no paragraph numbers in this volume--a problem should a revised edition ever be issued.
Personally, I, like many of the participants and Jung himself, didn't much comprehend the Tantric side of the discussions, particularly the Sat-cakra-nirupana. While the editor's introduction was clear enough, indeed quite good as an overview of the appropriation of such works by the community of analytical psychologists, the actual contents of the seminars were more about analytical psychology and Jung than about Tantrism. Jung does almost all of the talking. The questioners, however, will also be familiar to those studied in the history of the Jungian movement. Hauer's lecture alone really focuses on the ostensible topic. Interestingly, he was a Nazi race theorist intent on selling an "Aryan" religion to the National Socialists--a fact the editor does not conceal. Significantly, he and the Zurich Jungians broke with one another after the Nazi seizure of power in Germany.
So far as there is a theme to Jung's remarks which dominate the book, it is that this material, like all such material, is more grist for the mill of archetypal psychology. Repeatedly, it is claimed that the symbology of kundalini yoga, like the spontaneous dreams of people around the globe over all of history, confirms individuation theory. The "proof", as ever, is neither very clear nor very convincing.