Toni Wolff and C.G. Jung: A Collaboration is the first comprehensive account of the personal and professional collaboration between Toni Wolff and C.G. Jung. Little was known about Toni Wolff, the woman Jung called his "other wife," until now. It is constructed from critically reliable evidence, including archival records, private family documents, Wolff's and Jung's own statements, as well as material from Wolff's personal diaries.The material shows that Toni Wolff's influence on Jung was far greater than previously recognized. Their profound, yet poignant relationship during the early twentieth century gave rise to a groundbreaking vision of the human psyche.