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    Dolores Hitchens 
      Julia Clara Catharine Dolores (Birk Olsen) Hitchens 
[1907-1973] | 
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    Jim Sader, a private investigator, in Long Beach, California: | 
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    Sleep with Strangers (1955)  | 
    Sleep with Slander (1960)  | 
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    Collins & McKechnie, detectives in California [written with Bert Hitchens, 1897-1979]: | 
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    F.O.B. Murder (1955)  | 
    The Man Who Followed Women (1959)  | 
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    John Farrel, a railroad detective in southern California [written with Bert Hitchens]: | 
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    End of the Line (1957)  | 
    The Grudge (1963)  | 
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    Non-series: | 
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    The Blue Geranium (1941) [written as Dolan Birkley] 
      The Shivering Bough (1942) [written as Noel Burke] 
      Stairway to an Empty Room (1951) 
      Nets To Catch the Wind (1952) 
        APA: Widows Won’t Wait (1954) 
      Terror Lurks in Darkness (1953) 
      Beat Back the Tide (1954) 
        APA: The Fatal Flirt (1956) 
      One-Way Ticket [with Bert Hitchens] (1956) 
      Fools’ Gold (1958) 
      The Watcher (1959)  | 
    Footsteps in the Night (1961) 
      The Abductor (1962) 
      The Bank with the Bamboo Door (1965) 
      The Unloved (1965) [written as Dolan Birkley] 
      The Man Who Cried All the Way Home (1966) 
      Postscript to Nightmare (1967) 
        APA: Cabin of Fear (1968) 
      A Collection of Strangers (1969) 
      The Baxter Letters (1971) 
      In a House Unknown (1973)  | 
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    Written as D.B. Olsen 
Rachel [R] and Jennifer [J] Murdock, elderly sisters and amateur sleuths, along with Samantha the cat, and their friendly rival, police detective Lieutenant Stephen Mayhew [S], set mostly in Los Angeles, California: | 
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    The Clue in the Clay (1938) [S] 
      The Cat Saw Murder (1939) [RJS] 
      The Ticking Heart (1940) [S] 
      The Alarm of the Black Cat (1942) [RJ] 
      Cat’s Claw (1943) [RJS] 
      Catspaw for Murder (1943) [RJS] 
      The Cat Wears a Noose (1944) [RJS] 
      Cats Don’t Smile (1945) [RJ]  | 
    Cats Don’t Need Coffins (1946) [RJS] 
      Cats Have Tall Shadows (1948) [RJ] 
      The Cat Wears a Mask (1949) [RJ] 
      Death Wears Cat’s Eyes (1950) [RJ] 
      The Cat and Capricorn (1951) [RJ] 
      The Cat Walk (1953) [RJ] 
      Death Walks on Cat Feet (1956) [RJ]  | 
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    Written as D.B. Olsen 
A. Pennyfeather, an English professor at Clarenden College, set mostly in California: | 
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    Bring the Bride a Shroud (1945) 
      APA: A Shroud for the Bride (1957) 
      Gallows for the Groom (1947) 
      Devious Design (1948)  | 
    Something About Midnight (1950) 
      Love Me in Death (1951) 
      Enrollment Cancelled (1952) 
        APA: Dead Babes in the Wood (1954)  | 
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    Written as D.B. Olsen 
Non-series: | 
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    Death Cuts a Silhouette (1939)  | 
    Widows Ought To Weep (1947)  | 
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