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The Mark on the Door (Hardy Boys #13) (original 1934; edition 1934)
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Amazon.com Product Description (ISBN 0448089130, Hardcover)Frank and Joe Hardy, amateur detectives and brothers, investigate the mystery of a stolen boat and soon discover that the boat's disappearance is tied to a smuggling operation.
(retrieved from Amazon Mon, 30 Sep 2013 13:31:37 -0400)
The search for a stolen boat leads the Hardy brothers to Mexico where they become involved with a band of Indians and a strange smuggling operation.
(summary from another edition)
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