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30 The Wailing Siren Mystery (1951): The Hardy Boys Mystery

This is a picture of the Hardy Boys Book 30 The Wailing Siren Mystery (1951): The Hardy Boys Mystery

Volume 30: The Wailing Siren Mystery

The Hardy Boys dive into danger when investigating a series of shipwrecks connected to a mysterious wailing siren. As they explore treacherous coastal waters, Frank and Joe uncover a sinister plot involving insurance fraud and sunken treasure. With their father's and marine experts' assistance, the brothers must brave stormy seas and cunning criminals to silence the siren and bring the perpetrators to justice.

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