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When a gang that uses parties as a cover for robberies victimizes a masquerade party Nancy is attending, the teen-age detective switches identity with her girl friend to solve the case.
Chapter
I Suspicious Masquerader
II A Daring Theft
III False Discoveries
IV Confusion
V Strange Numbers
VI Kidnapped!
VII Double Talk
VIII Telltale Tag
IX Indelible Evidence
X A New Ruse
XI Loot for Sale
XII Clever Detection
XIII Blue Iris Inn
XIV Nancy's Disguise
XV Captured!
XVI Important Identification
XVII Prisoners
XVIII A Threat Revealed
XIX Fire!
XX Unmasked
This is book 30 in the Nancy Drew Mystery Stories series.
List the books that contain additional information about this book.
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