Columbia subject headings:
Barcelona (Spain)--Fiction.
Detective and mystery fiction.
Detective and mystery stories, Spanish.
Missing persons--Fiction.
Harvard subject headings:
Barcelona (Spain)--Fiction.
Detective and mystery fiction
Detective and mystery stories, Spanish
Missing persons--Fiction
Princeton subject headings:
Barcelona (Spain)--Fiction.
Detective and mystery fiction.
Detective and mystery stories.
Fiction.
Missing persons--Fiction.
Novels.