\'Fascinating, brilliant, horribly addictive\' Guardian From the day that Sheba Hart joins the staff at St George\'s, history teacher Barbara Covett is convinced that she has found a kindred spirit. When Sheba is discovered having an illicit affair with one of her pupils, Barbara appoints herself Sheba\'s chief defender. Yet all is not as it first appears in this dark story and as Sheba will eventually discover, a friend can be as treacherous as any lover. \'Superbly gripping\' Daily Telegraph