Book excerpt: This book provides a timely exploration and comparison of key concepts in the theories of Melanie Klein and Jacques Lacan, two thinkers and clinicians whose influence over the development of psychoanalysis in the wake of Freud has been profound and far-reaching. Whilst the centrality of the unconscious is a strong conviction shared by both Klein and Lacan, there are also many differences between the two schools of thought and the clinical work that is produced in each. The purpose of this collection is to take seriously these similarities and differences. Deeply relevant to both theoretical reflection and clinical work, the New Klein-Lacan Dialogues should make interesting reading for psychoanalysts, psychotherapists, mental health professionals, scholars and all those who wish to know more about these two leading figures in the field of psychoanalysis.The collection centres around key concepts such as: 'symbolic function', the 'ego', the 'object', the 'body', 'trauma', 'autism', 'affect' and 'history and archives'.