The unpublished Russian diary and letters of Sabina Spielrein represent a milestone for academics, scholars, historians, and psychoanalysts whose interest in the most enigmatic woman to have pioneered psychoanalysis and developmental psychology in the first part of the 20th century has never ceased to grow after she was rediscovered in the mid-1970s. These Primary sources, which include unreleased drawings and notes, were patiently exhumed and translated by Lothane from New York to Russia and across Europe over two decades, with the collaboration of Spielrein’s grandnephew, Vladimir Shpilrain.