My friend, Gottfried M. Heuer, has published an important book which I warmly recommend: "Freud's 'Outstanding Colleague'/Jung's 'Twin Brother' " (Publisher:Routledge). It is a study of 'The suppressed psychoanalytic and political significance of Otto Gross'. It is a powerful book, beautifully composed with scholarship, and love. I was honoured to have been accorded the opportunity to make a small contribution to the book, via quotation of a paragraph from the thoughts I have shared with Gottfried.
Gottfried talks about his book with Jonathan Chadwick @ https://vimeo.com/196609212