Robert Hale) Report on Indochina (1953, Robert Hale) Ride to Rome (1953, Herbert Jenkins) Spy-Counter-Spy (1953, as Don Betteridge, Robert Hale) Yours for Action (1953, Civil Service Clerical Association) Berlin and Back (1954, Herbert Jenkins) Double Menace (1954, Robert Hale) The Case of the Berlin Spy (1954, as Don Betteridge, Robert Hale) The Sosnowski Affair: Inquest On a Spy (1954, Werner Laurie) The Wishful Think (1954, Robert Hale) North African Journey (1955, Robert Hale) Still Flows the Danube (1955, Herbert Jenkins) The Gibraltar Conspiracy (1955, as Don Betteridge, Robert Hale) Inquest on Mata Hari (1956, Robert Hale) Operation Barbarossa (1956, Robert Hale) Real Life Spies (1956, Hutchinson) One Hundred Years of Good Company: Published On the Occasion of the Ruston Centenary 1857 – 1957 (1957, Ruston & Hornsby) Spain On A Shoestring (1957, Herbert Jenkins) The Otan Plot (1957, Robert Hale) The Three Germanies (1957, Robert Hale) Flowers for the Living (1958, with Guy Bolton, Robert Hale) Taken at the Flood (1958, Robert Hale) The Spies of Peenemunde (1958, as Don Betteridge, Robert Hale) Unknown Germany (1958, Herbert Jenkins) Danger Spots of the World (1959, Robert Hale) Portrait of Poland (1959, Robert Hale) Visa to Russia (1959, Herbert Jenkins) Contact Man (1960, as Don Betteridge, Robert Hale) Silver Greyhound (1960, Robert Hale) Speaking from Memory (1960, Herbert Jenkins; autobiography) Unknown Yugoslavia (1960, Herbert Jenkins) Bulgarian Background (1961, Robert Hale) Far Eastern Journey: Across India and Pakistan to Formosa (1961, Herbert Jenkins) Let's Look At Germany (1961, Museum Press) Presenting People Living Dangerously (1961, Paul Hamlyn) Mr. Kennedy's America (1962, Herbert Jenkins) The Blue Ants: The First Authentic Account of the Russian-Chinese War of 1970 (1962, Robert Hale) The Package Holiday Spy Case (1962, as Don Betteridge, Robert Hale)) The World of Espionage (1962, Souvenir Press) This Is Your Life (1963, Robert Hale) Unknown France (1963, Herbert Jenkins) Behind the Berlin Wall (1964, Robert Hale) Round the World in Seventy Days (1964, Herbert Jenkins) Spies in Britain (1964, Robert Hale) The Travelling Executioners (1964, Robert Hale) Background to Vietnam (1965, Robert Hale) Let's Visit France (1965, Burke Publishing) Let's Visit Malaysia and Her Neighbours (1965, Burke Publishing) South African Journey (1965, Herbert Jenkins) The Spy At No. 10 (1965, Robert Hale) Evil Phoenix (1966, Robert Hale) Spain Revisited (1966, Herbert Jenkins) Draw the Dragon's Teeth (1967, Robert Hale) Let's Visit South Africa (1967, Burke Publishing) Let's Visit Vietnam (1967, Burke Publishing)