Columbia subject headings:
American fiction--20th century--History and criticism.
Detective and mystery stories, American--History and criticism.
Detectives in literature.
Harvard subject headings:
American fiction--20th century--History and criticism
Detective and mystery stories, American--History and criticism.
Detectives in literature.
Private investigators in literature.
Princeton subject headings:
American fiction--20th century--History and criticism.
Detective and mystery stories, American--History and criticism.
Detectives in literature.