A third Jung volume, Mysteria: Jung and the Ancient Mysteries, was also slated for publication (1994/1995) by Princeton, but suppressed at the behest of the Jung family. As an independent researcher delving into the history of medicine, Noll was one of the first scholars worldwide to adopt a critical view of Jung in his works. Publishing at a time when almost all biographies of Jung portrayed him in an excessively positive light, Noll’s books provoked a forceful pushback from the Jungian community. Noll never answered his critics, though, but moved on to other research interests of his, such as shamanism and dementia praecox/schizophrenia.