- Playwright: "Water in a Sieve: A Fantasy in One Act"
- (1967) Novel: "Cargo of Eagles"
- (1966) Novel: "The Mysterious Mr. Campion"
- (1968) Novel: "Mr. Campion's Clowns"
- (1965) Novel: "Mr. Campion's Lady"
- (1965) Novel: "The Mind Readers"
- (1963) Novel: "The Mysterious Mr. Campion"
- (1962) Novel: "The China Governess"
- (1961) Novel: "Three Cases for Mr. Campion"
- (1959) Novel: "Crime and Mr. Campion"
- (1958) Novel: "Hide My Eyes"
- (1958) Novel: "Tether's End"
- (1955) Novel: "The Estate of the Beckoning Lady" (aka "The Beckoning Lady")
- (1954) Novel: "No Love Lost: Two Stories of Suspense"
- (1952) Novel: "The Tiger in the Smoke".l NOTE: Filmed as Tiger in the Smoke (1956)
- (1949) Novel: "More Work for the Undertaker"
- (1949) Novel: "Deadly Duo" (aka "Take Two at Bedtime")
- (1947) Novel: "The Case Book of Mr. Campion"
- (1945) Novel: "Pearls Before Swine" (aka "Coroner's Pidgin")
- (1943) Novel: "The Galantrys" (aka "Dance of the Years")
- (1941) Book: "The Oaken Heart"
- (1941) Novel: "Traitor's Purse"
- (1940) Novel: "Black Plumes"
- (1938) Novel: "The Fashion in Shrouds"
- (1941) Novel: "Dancers in Mourning" (aka "Who Killed Chloe?")
- (1937) Short stories: "Mr. Campion, Criminologist"
- (1937) Novel: "The Case of the Late Pig". NOTE: Filmed as The Case of the Late Pig (1968).
- (1936) Novel: "Flowers for the Judge"
- (1936) Novel: "Six Against Scotland Yard"
- (1934) Novel: "Death of a Ghost"
- (1933) Novel: "Kingdom of Death" (aka "Sweet Danger")
- (1930) Novel: "Mystery Mile"
- (1931) Nove: "The Gyrth Chalice Mystery" (aka "Look to the Lady")
- (1931) Novel: "Police at the Funeral"
- (1929) Novel: "The Black Dudley Murder" (aka "Crime at Black Dudley")
- (1923) Novel: "Blackkerchief Dick"
- Playwright: "Room to Let" . NOTE: Filmed as Room to Let (1950).
- (1933) Novel: "Sweet Danger".
- (1932) Novel: "Look to the Lady".
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