Grieve; Herbert Jenkins) I Saw Spain (1937, Herbert Jenkins) Lady Doctor Woman Spy (1937, Hutchinson) Albanian Journey (1938, Sir Isaac Pitman & Sons) Danger Spots of Europe (1938, Robert Hale) Death Under Gibraltar (1938, Victor Gollancz) Ride to Russia (1938, Herbert Jenkins) Scotland Yard Alibi (1938, as Don Betteridge, Herbert Jenkins) Baltic Roundabout (1939, Herbert Jenkins) Cast Iron Alibi (1939, as Don Betteridge, Herbert Jenkins) Death to the Spy (1939, Victor Golancz) Maginot Line Murder (1939, Victor Golancz) Siegfried Spy (1939, Victor Golancz) Savoy! Corsica! Tunis! Mussolini's Dream Lands (1940, Herbert Jenkins) Secrets of German Espionage (1940, Robert Hale) The Story of Poland (1940, Hutchinson) Death to the Fifth Column (1941, Victor Golancz) One Man's Year (1941, Victor Golancz) Secret Weapon (1941, Victor Golancz) Balkan Spy (1942, as Don Betteridge, Herbert Jenkins) Black Market (1942, Victor Golancz) The New Europe (1942, Robert Hale) American Journey (1943, Robert Hale) The Escape of General Gerard (1943, as Don Betteridge, Herbert Jenkins) Balkan Background (1944, Robert Hale) Second Front - First Spy (1944, Victor Golancz) British Journey (1945, Robert Hale) Dictator's Destiny (1945, as Don Betteridge, Herbert Jenkins) Spy Catchers (1945, collection of 31 short stories, Victor Golancz) The Spy in the Brown Derby (1945, Victor Golancz) Dead Man Murder (1946, Victor Golancz) Russia's Neighbour, the New Poland (1946, Victor Gollancz) Middle Eastern Journey (1947, Victor Golancz) The Potsdam Murder Plot (1947, as Don Betteridge, Herbert Jenkins) The Red Spider Web: The Story of Russian Spying in Canada (1947, Latimer House) Baltic Background (1948, Robert Hale) Moscow Murder (1948, Victor Golancz) News from the East (1948, Victor Golancz) The Captured Archives: The Story of the Nazi-Soviet Documents (1948, Herbert Jenkins) The Flying Saucer (1948, Victor Gollancz) Come Adventuring With Me (1949, Latimer House) Mediterranean Background (1949, Robert Hale) Shoot! (1949, Victor Golancz) The Lazy Meuse (1949, Herbert Jenkins) Cup Final Murder (1950, Victor Golancz) Epics of Espionage (1950, Werner Laurie) Spies Left! (1950, as Don Betteridge, Robert Hale) The Sisters Alsace-Lorraine (1950, Herbert Jenkins) Centre Court Murder (1951, Victor Golancz) Not Single Spies (1951, as Don Betteridge, Victor Gollancz) Oberammergau Journey (1951, Herbert Jenkins) Turkish Crossroads (1951, Robert Hale) Both Sides of the Pyrenees (1952, Herbert Jenkins) Death At Lords (1952, Victor Gollancz) Soviet Atomic Spies (1952, Robert Hale) They Saved London (1952, Werner Laurie; adapted in 1958 as the film Battle of the V.1) Tito's Yugoslavia (1952, Robert Hale) Morocco Today (1953,