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Pseudonym of Elinor Denniston. She also wrote under the pseudonyms 'Dennis Allan' and 'Helen K. Maxwell'. |
Titles and year of publication:
| 1) No Tears for the Dead | 1948 |
| 2) The Girl from Nowhere | 1949 |
| 3) Bones of Contention (Also published as: The Other Woman [1976]) | 1950 |
| 4) The Hundredth Door | 1950 |
| 5) An Ape in Velvet | 1951 |
| 6) Wake the Sleeping Wolf (Also published as: Don’t Kill, My Love [1953]) | 1952 |
| 7) The Man in the Shadow | 1953 |
| 8) Dark Intent | 1954 |
| 9) Death and Mr. Potter (Also published as: The Peacock Is a Bird op Prey [1976]) | 1955 |
| 10) The Last Gamble | 1956 |
| 11) Run for Your Life | 1957 |
| 12) Where Is Mary Bostwick? (Also published as: Escape to Fear [1958]) | 1958 |
| 13) Dangerous to Me | 1959 |
| 14) It's Murder, Mr. Potter (Also published as: Curtain Call [1976]) | 1961 |
| 15) Repent at Leisure (UK Title: The Deadly Noose [1963]) | 1962 |
| 16) Back Door to Death (Also published as: Nightmare Honeymoon [1976]) | 1963 |
| 17) Fatal Lady | 1964 |
| 18) Call It Accident | 1965 |
| 19) Suffer a Witch | 1965 |
| 20) Scared to Death | 1966 |
| 21) Wild Night | 1966 |
| 22) Fear of a Stranger | 1967 |
| 23) The Shelton Conspiracy | 1967 |
| 24) Malice Domestic | 1968 |
| 25) Nightmare House | 1968 |
| 26) Girl on a High Wire | 1969 |
| 27) No Hiding Place | 1969 |
| 28) A Calculated Risk | 1970 |
| 29) Ominous Star | 1971 |
| 30) This Woman Wanted | 1971 |
| 31) The First Mrs. Winston | 1972 |
| 32) Sleep Without Morning | 1972 |
| 33) Reckless Lady | 1973 |
| 34) Trust a Woman? | 1973 |
| 35) The Brownstone House (UK Title: Murder by Bequest [1976]) | 1974 |
| 36) One O'Clock at the Gotham | 1974 |
| 37) The Barclay Place | 1975 |
| 38) The Dark Hill | 1975 |
| 39) Put Out the Light | 1976 |
| 40) Where Helen Lies | 1976 |
| 41) The Girl Who Had Everything | 1977 |
| 42) The Slippery Step | 1977 |
| As 'Dennis Allan' | |
| 1) House of Treason | 1936 |
| 2) Brandon Is Missing | 1940 |
| 3) Born to Be Murdered | 1945 |
| 4) Dead to Rights | 1946 |
| As 'Helen K. Maxwell' | |
| 1) The Girl in a Mask | 1971 |
| 2) Leave It to Amanda | 1972 |
| 3) The Livingston Heirs | 1973 |