While the majority of people in most of the world - including most of our patients - have at least one sibling, sibling relationships have not been a focus of attention in psychoanalysis. Indeed, with some notable exceptions, we have tended to overlook the importance of siblings in life and in psychological development. Joyce Edward, a clinical social worker and psychoanalyst, brings together in one volume an impressive array of ideas on siblings, illustrated with many rich and interesting examples, including clinical vignettes that suggest the ubiquity, variety and importance of sibling dynamics.