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Edward Stratemeyer 002

For the original edition of this book, see The Secret Warning (original text).

The Secret Warning is the 17th book in The Hardy Boys series. It was first published in 1938 by Grosset & Dunlap and was revised and re-published in 1966.

Plot summary

Frank and Joe Hardy, help their father, Fenton as he looks into claims that million-dollar artifact was lost aboard a freighter that sank off Whalebone Island in Bayport. Some suspect defraud against the shipping line's insurance company, but whoever is at fault the Hardys are determined to get to the bottom of their latest mystery.


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Businesses and organizations


to be added.

Foreign Editions

  • Collins issued The Secret Warning as the 50th volume in their Hardy Boys series in 1980.[3]


  1. Who Wrote the Hardy Boys? at
  2. The Secret Warning Major Edition Types at The Hardy Boys Unofficial Home Page
  3. For information on the Collins Hardcover edition please refer to A Figure in Hiding

External links

to be added.

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