"This pioneering book offers wonderful insight into the experience of opposite sex twins in adulthood. It is a very welcome addition to the literature and warmly recommended to all who know or work with twins, their families, colleagues and friends."--Alida Gersie PhD, writer, instigator of story-based therapy and trainer. 'Beautifully written, this is a wonderfully readable, informative, thought-provoking and sensitive book a welcome addition to the literature.' - Barry Mason PhD, Former Director, Institute of Family Therapy, London.