The Red Book, published with great success in 2009, contains the core of C. G. Jung's later works. In it, he developed his main theories regarding archetypes, the collective unconscious, and the process of individuation, which transformed psychotherapy from treatment of the suffering to a means for higher personal development. As Sara Corbett wrote in the New York Times, "Creating one of the truly visionary works of modern history, The Red Book is a unique, unclassifiable piece. As an exploration of what it means to be human, it transcends the history of psychoanalysis and highlights Jung's position among revolutionary thinkers like Marx, Orwell, and, of course, Freud." The Red Book: A Reader's Edition includes Sonu Shamdasani's introductory essay and the complete translation of Jung's vital work in one volume.