|  Leslie Cargill was born as Leslie Clarke. He later took the last name of his stepfather. He was an author and journalist. | 
Titles and year of publication:
| 1) The Yellow Phantom | 1935 | 
| 2) Death Goes by Bus | 1936 | 
| 3) Murder in the Procession | 1937 | 
| 4) Heads You Lose | 1938 | 
| 5) Gestapo Gauntlet | 1939 | 
| 6) Beyond the Frontiers | 1940 | 
| 7) It Might Have Meant Murder | 1940 | 
| 8) Death Walks in Scarlet | 1941 | 
| 9) The Missing Background | 1942 | 
| 10) The Man from the Rhine | 1943 | 
| 11) The Surprising Sanctuary | 1945 | 
| 12) Fortune's Apprentice | 1946 | 
| 13) The Man Who Wasn’t Himself | 1947 | 
| 14) Was It Montelli? | 1947 | 
| 15) Cherry's Choice | 1948 | 
| 16) Next Door to Murder | 1948 | 
| 17) Matrimony Most Murderous | 1949 | 
| 18) Motley Menace | 1949 | 
| 19) The Dead Are So Dumb | 1950 | 
| 20) Death Sets the Pace | 1950 | 
| 21) The Lady Was Elusive | 1952 |