Book excerpt: This is the story of a national obsession. Ever since the Ratcliffe Highway Murders caused a nation-wide panic in Regency England, the British have taken an almost ghoulish pleasure in 'a good murder'. This fascination helped create a whole new world of entertainment, inspiring novels, plays and films, puppet shows, paintings and true-crime journalism - as well as an army of fictional detectives who still enthrall us today. A Very British Murder is Lucy Worsley's captivating account of this curious national obsession. It is a tale of dark deeds and guilty pleasures, a riveting investigation into the British soul by one of our finest historians.