The Hardys protect the future of a satellite and track down missing porpoises. A good kids book.
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The Hardys go undercover at NASA and end up tracking down porpoises - all as part of the same case! This is a good kids book. I recommend it to all fans of this series.
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This book is about satellites and porpoises, and they even have something to do with each other. A good Hardy Boys mystery for kids.
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