They were close sisters and best friends. But the abdication of the crown by their uncle Edward VIII once and for all changed the once strong and trusting relationship between Elizabeth and Margaret. Now they are separated by “a squad of secretaries opening doors.” Margaret is forced to call her sister Your Highness instead of the affectionate “Lilibet.” And for Elizabeth, Margot’s antics, which always seemed cheerful, are increasingly becoming a source of tension. Royal biographer Andrew Morton presents the first detailed biography of the world's two most famous sisters, revealing details of their relationship - from the idyll of their secluded childhood to the different destinies they were destined for after their father's death and Elizabeth's accession to the throne. This non-fiction book is based on the testimony of those close to the Windsor family, former palace aides, as well as insiders who knew Elizabeth and Margaret over the years.