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Publisher's Summary

Valuable electronic parts containing platinum are being stolen from shipments made by Stanwide Mining Equipment Company's cargo planes, and Frank and Joe Hardy are called upon to assist their world-renowned detective father solve the baffling case.
At Stanwide, the boys pose as employees and become suspicious of their boss's hostility towards them. Is he involved in the racket? And what is the truth behind the plane crash at sea in which Clint Hill, chief pilot for Stanwide was killed?
Frank and Joe launch an aerial search for clues to the platinum thieves' hideout, believing that they will also uncover the mystery behind Hill's accident. The puzzling trail of clues leads the young sleuths to an uninhabited Caribbean island, near the scene of the plane crash - then to a mountaintop in Montana and a danger-filled showdown with the band of theives. But the final discovery - and the most startling and exciting revelation of all - is made in the boys' hometown of Bayport.
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Listen to more books in the Hardy Boys series.
©1930 Franklin W. Dixon (P)2007 Phoenix
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Customer Reviews

Most Helpful
5 out of 5 stars
By michael h kane on 08-16-15

Good job

The hardy boy mystery series is really fun it was super exiting and really well writen

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2 of 3 people found this review helpful

5 out of 5 stars
By B and MJ on 03-23-18

My grandson will love this book.

I like to preview books before giving them. This one is full of all that makes a good mystery without leaving a person frightened. I know he will enjoy it and pick up several new words.
Mj

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