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This series provides a unique new twist on Sherlock Holmes by having him assisted by a band of devoted boys, street urchins who love to solve mysteries, called the Baker Street Irregulars. These boys go everywhere, see everything, overhear everyone undetected. In this exciting tale, Wiggins, Ozzie, Simon, and the rest–with the aid of Pilar, a gypsy girl–help Sherlock Holmes solve the case of the deaths of the Amazing Walendas, a family of circus tightrope walkers.