Jon Mills is now well-known for his scholarly work in psychoanalysis and philosophy, as well as for his award-winning television series, The Talking Cure. Mills’ most recent book, Underworlds. Philosophies of the Unconscious from Psychoanalysis to Metaphysics, is an exemplary case of Mills’ scholarly work. The book articulates some of the leading characterizations of the unconscious in modern thought, both in philosophical and psychoanalytical traditions. With chapters on G.W.F. Hegel, Sigmund Freud, Jacques Lacan, Carl Jung, and Alfred North Whitehead, Mills offers a surprisingly broad yet detailed account of these varying treatments of the unconscious, not only for