Nero Wolfe
Fer-De-Lance (1934)
     aka Meet Nero Wolfe
The League of Frightened Men (1935)
The Rubber Band (1936)
     aka To Kill Again
The Red Box (1937)
     aka Case of the Red Box
Too Many Cooks (1938)
Over My Dead Body (1939)
Some Buried Caesar (1939)
     aka The Red Bull
Where There's a Will (1940)
Black Orchids (1942)
Not Quite Dead Enough (1944)
The Silent Speaker (1946)
Too Many Women (1947)
And Be a Villain (1948)
     aka More Deaths Than One
The Second Confession (1949)
Trouble in Triplicate (1949)
Curtains for Three (1950)
Even in the Best Families (1950)
Three Doors to Death (1950)
Murder By the Book (1951)
Prisoner's Base (1952)
     aka Out She Goes
Triple Jeopardy (1952)
The Golden Spiders (1953)
The Black Mountain (1954)
Three Men Out (1954)
Before Midnight (1955)
Might As Well Be Dead (1956)
Three Witnesses (1956)
If Death Ever Slept (1957)
Three for the Chair (1957)
And Four to Go (1958)
     aka Crime And Again
Champagne for One (1958)
Plot It Yourself (1959)
     aka Murder in Style
Too Many Clients (1960)
The Final Deduction (1961)
Gambit (1962)
Homicide Trinity (1962)
The Mother Hunt (1963)
A Right to Die (1964)
Trio for Blunt Instruments (1964)
The Doorbell Rang (1965)
Death of a Doxy (1966)
The Father Hunt (1968)
Death of a Dude (1969)
Please Pass the Guilt (1973)
A Family Affair (1975)
Death Times Three (1985)
Some Buried Caesar / The Golden Spiders (omnibus) (2008)

Theodolinda Dol Bonner
The Hand in the Glove (1937)
     aka Crime On Her Hands

Alphabet Hicks
Alphabet Hicks (1941)
     aka The Sound of Murder

Her Forbidden Knight (1913)
Under the Andes (1914)
A Prize for Princes (1914)
The Great Legend (1916)
How Like a God (1929)
Seed On the Wind (1930)
Golden Remedy (1931)
Forest Fire (1933)
The President Vanishes (1934)
O Careless Love! (1935)
Mr. Cinderella (1938)
The Mountain Cat (1939)
     aka The Mountain Cat Murders
Red Threads (1939)
Eeny Meeny Murder Mo (1999)