"Private investigators in literature." . . "Criticism, interpretation, etc"@en . "Criticism, interpretation, etc" . . . . . . . "221 B : studies in Sherlock Holmes" . "Studies in Sherlock Holmes"@en . "Studies in Sherlock Holmes" . . "221 B studies in Sherlock Holmes"@en . "221 B"@en . "221 B" . "Two two one B"@en . "Two two one B" . . . . . . . . . "221B studies in Sherlock Holmes"@en . . . . "Two hundred twenty-one B" . . "221B; studies in Sherlock Holmes"@en . "Sherlock Holmes, Studies in"@en . . . . . "221 B; studies in Sherlock Holmes"@en . "221 B; studies in Sherlock Holmes" . "Two twenty-one B" . "Two twenty-one B"@en . . "221B"@en . . . . . . "221B : studies in Sherlock Holmes"@en . "221B : studies in Sherlock Holmes" . "221 B : Studies in Sherlock Holmes by various hands" . "221B; studies in Sherlock Holmes, by various hands" . . . . "Detective and mystery stories, English History and criticism." . . . . "Detective and mystery stories, English." . . "Holmes, Sherlock (Fictitious character)" . . "Sherlock Holmes." . .