| Series | | Books |
| Sterry Browning |
| |
| Other | | Coastal Commander (1946) |
| | | Crime at Cape Folly (1951) |
| | | Sex Marks the Spot (1954) |
| |
| James Gannett |
| |
| Other | | The Man Without a Face (1951) |
| | | The Silver Emu (1951) |
| | | Murder After Dark (1956) |
| |
| Leo Grex |
| |
| Other | | The Tragedy at Draythorpe [Paul Irving] (1931) |
| | | The Nightborn (1931) |
| | | The Madison Murder [Paul Irving] (1933) |
| | | The Lonely Inn Mystery [Paul Irving] (1933) |
| | | Murder in the Sanctuary [Paul Irving] (1934) |
| | | The Man from Manhattan (1934) |
| | | Crooner’s Swan Song (1935) |
| | | Stolen Death [Paul Irving] (1936) |
| | | Transatlantic Trouble (1937) |
| | | The Carlent Manor Crime [Paul Irving] (1939) |
| | | The Black-Out Murders (1940) |
| | | The Stalag Mites (1947) |
| | | King Spiv (1948) |
| | | Crooked Sixpence (1949) |
| | | Stand-In for Murder (1950) |
| | | Ace of Danger [Paul Irving] (1952) |
| | | Thanks for the Felony (1958) |
| | | Larceny in Her Heart (1959) |
| | | Terror Wears a Smile (1962) |
| | | The Brass Knuckle (1964) |
| | | Violent Keepsake [Phil Sanderson] (1967) |
| | | The Hard Kill [Phil Sanderson] (1969) |
| | | Kill Now-Pay Later (1971) |
| | | Die—As in Murder [Mike Capper] (1974) |
| | | Death Throws No Shadow [Mike Capper] (1976) |
| | | Mix Me a Murder [Mike Capper] (1978) |
| | | Hot Ice (1983) |
| |
| Louis Grey |
| |
| Other | | The Signet of Death (1934) |
| |
| Leonard Gribble |
| |
| Ward and Sally Digburn | | (1954) |
| |
| Other | | The Gillespie Suicide Mystery aka The Terrace Suicide Mystery [Supt. Anthony Slade] (1929) |
| | | The Case of the Marsden Rubies [Supt. Anthony Slade] (1929) |
| | | The Grand Modena Murder [Supt. Anthony Slade] (1930) |
| | | Is This Revenge? aka The Serpentine Murder [Supt. Anthony Slade] (1931) |
| | | The Stolen Home Secretary aka The Stolen Statesman [Supt. Anthony Slade] (1932) |
| | | The Yellow Bungalow Mystery [Supt. Anthony Slade] (1933) |
| | | The Secret of Tangles [Supt. Anthony Slade] (1933) |
| | | The Riddle of the Ravens [Supt. Anthony Slade] (1934) |
| | | The Death Chime [Supt. Anthony Slade] (1934) |
| | | Mystery at Tudor Arches [Supt. Anthony Slade] (1935) |
| | | The Case of the Malverne Diamonds [Supt. Anthony Slade] (1936) |
| | | Riley of the Special Branch [Supt. Anthony Slade] (1936) |
| | | The Case-Book of Anthony Slade aka The Velvet Mask [Supt. Anthony Slade] (1937) |
| | | Who Killed Oliver Cromwell? [Supt. Anthony Slade] (1937) |
| | | Tragedy in E Flat [Supt. Anthony Slade] (1938) |
| | | The Arsenal Stadium Mystery [Supt. Anthony Slade] (1939) |
| | | Murder First Class [Supt. Anthony Slade] (1946) |
| | | The Carlent Manor Crime (1946) |
| | | Atomic Murder [Supt. Anthony Slade] (1947) |
| | | They Kidnapped Stanley Matthews [Supt. Anthony Slade] (1950) |
| | | Hangman’s Moon [Supt. Anthony Slade] (1950) |
| | | Mystery Manor (1951) |
| | | The Frightened Chameleon [Supt. Anthony Slade] (1951) |
| | | Murder Out of Season [Supt. Anthony Slade] (1952) |
| | | The Glass Alibi [Supt. Anthony Slade] (1952) |
| | | Diamond Web (1953) |
| | | She Died Laughing [Supt. Anthony Slade] (1953) |
| | | Death at the Inn (1953) |
| | | Sally of Scotland Yard (with Geraldine Laws) (1954) |
| | | The Inverted Crime [Supt. Anthony Slade] (1954) |
| | | Death Pays the Piper [Supt. Anthony Slade] (1956) |
| | | Superintendent Slade Investigates [Supt. Anthony Slade] (1956) |
| | | Stand-In for Murder [Supt. Anthony Slade] (1957) |
| | | Don’t Argue with Death [Supt. Anthony Slade] (1959) |
| | | Wantons Die Hard [Supt. Anthony Slade] (1961) |
| | | Double Spy (1963) |
| | | Heads You Die [Supt. Anthony Slade] (1964) |
| | | The Violent Dark [Supt. Anthony Slade] (1965) |
| | | Strip-Tease Macabre [Supt. Anthony Slade] (1967) |
| | | A Diplomat Dies [Supt. Anthony Slade] (1969) |
| | | Alias the Victim [Supt. Anthony Slade] (1971) |
| | | Programmed for Death [Supt. Anthony Slade] (1973) |
| | | You Can’t Die Tomorrow [Supt. Anthony Slade] (1975) |
| | | Midsummer Slay Ride [Supt. Anthony Slade] (1976) |
| | | The Cardinal’s Diamonds (1976) |
| | | Crime on Her Hands [Supt. Anthony Slade] (1977) |
| | | Death Needs No Alibi [Supt. Anthony Slade] (1979) |
| | | Dead End in Mayfair [Supt. Anthony Slade] (1981) |
| | | The Dead Don’t Scream [Supt. Anthony Slade] (1983) |
| | | Violent Midnight [Supt. Anthony Slade] (1986) |
| |
| Piers Marlowe |
| |
| Other | | The Double Thirteen [Double Thirteen Club] (1947) |
| | | Loaded Dice [Double Thirteen Club] (1949) |
| | | Demon in the Blood (1955) |
| | | The Dead Don’t Scare [Supt. Frank Drury] (1963) |
| | | The Men in Her Death [Supt. Frank Drury] (1964) |
| | | Promise to Kill [Supt. Frank Drury] (1965) |
| | | A Knife for Your Heart [Supt. Frank Drury] (1966) |
| | | Hire Me a Hearse [Supt. Frank Drury] (1968) |
| | | Cash My Chips, Croupier [Supt. Frank Drury] (1969) |
| | | Killer in the Shade [Supt. Frank Drury] (1973) |
| |
| Dexter Muir |
| |
| Other | | The Pilgrims Meet Murder (1948) |
| | | The Speckled Swan (1949) |
| | | Rosemary for Death (1952) |
| |
| Bruce Sanders |
| |
| Ward and Sally Digburn | | (1957) |
| | | (1958) |
| | | (1964) |
| | | (1967) |
| |
| Other | | The Scarlet Widow (1943) |
| | | Blonde Blackmail (1945) |
| | | Pink Silk Alibi (1946) |
| | | Deadly Jade (1947) |
| | | Tawny Menace (1948) |
| | | Madame Bluebeard (1951) |
| | | Kiss for a Killer (1953) |
| | | Midnight Hazard (1955) |
| | | The Telltale Corpus Delicti aka They Couldn’t Lose the Body (1966) |
| |