The Baker Street Irregulars return to help Sherlock Holmes with a strange mystery involving murder, abduction, and a search for lost treasure, and when a personal friend of Holmes disappears, the gang tries to determine whether there is a traitor in their ranks.
Series:
Sherlock Holmes and the Baker Street Irregulars ; casebook no. 3 Mack, Tracy. Sherlock Holmes and the Baker Street Irregulars ; casebook no. 3.
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