Crusades (1999) Two Thousand Years Part 2 (1999) The Routes of English (2001) The Adventure of English (2003) Twelve Books That Changed the World (2006) In Our Time (editor) (2009) Children's books A Christmas Child (1977) My Favourite Stories of Lakeland (editor) (1981) Filmography , as screenwriter: Isadora (1968) (with Clive Exton and