Columbia subject headings:
Berlin (Germany)--Fiction.
Detective and mystery fiction.
Diplomatic protests--Fiction.
Murder--Investigation--Fiction.
Novels.
Harvard subject headings:
Berlin (Germany)--Fiction
Diplomatic protests--Fiction.
Murder--Investigation--Fiction
Princeton subject headings:
Berlin (Germany)--Fiction.
Diplomatic protests--Fiction.
Fiction.
Kappe, Hermann (Fictitious character)--Fiction.
Murder--Investigation--Fiction.
Novels.