This collection, written by leading Lacanian psychoanalytic theorists and practitioners, is a unique exploration of the novel aspects of perversion from the perspective of cruelty—a psychoanalytic study that has never been sufficiently undertaken in an English-speaking world. Instead of reducing the notion of perversion to cultural representations, a historical discourse or a clinical diagnosis, the authors in this collection draw on Freud, Kant, Hegel, Marquis de Sade, Derrida, Deleuze and Žižek to untie the knot of “psychic cruelty� intrinsic to perversion and therefore “de-sexualize� perverted acts. They do so by theorizing perversion in psychoanalytic concepts of the Oedipus complex, the-Name-of-the-Father and jouissance, and furthermore in the perspective of the clinics of neurosis and psychosis, in dialogue with a clinical praxis, philosophy and literature.