Fascinating narrative history of medicine and of what happens when molecular genetics are formed abnormally in a human. Features a host of remarkable case studies including a girl who changed sex during puberty and a an excessively hairy family that was kept at the Burmese Royal Court for four generations. It tied-in to a three-part Channel 4 series. A second series is currently under discussion. This book won the Guardian First Book Award and the Aventis Prize in hardback. "Leroi writes beautifully, charging his case studies with drama and pathos" Time Out