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Publisher's Summary

Determined to learn the secret of the old mill, Frank and Joe employ a clever use to gain entrance and become trapped. There they unravel two mysteries, one involving a counterfeiting case and the other, a national security case their father is working on.
©1990, 1962, 1955, 1927 Simon & Schuster, Inc.; (P)2002 Random House, Inc. Listening Library, an imprint of the Random House Audio Publishing Group
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Customer Reviews

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By Patrick Mooney on 07-23-15

This is really Book 2!

This is really book 2. That's my only complaint. I hate to read books out of sequence.

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1 of 1 people found this review helpful


By Amazon Customer on 06-06-17

Love this book!

The title says it all. I don't want to write 15 words. ha ha ha

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Customer Reviews

Most Helpful

By Chris on 06-30-17

Amazing

I loved how much suspense and jumps there were in the story, also a thrilling experience for a young reader or listener

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By Thomas on 03-13-17

marvelous​

I will look forward to the next book he's a genius but the first is best and bill Irwin is terrific

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