
Written by Franklin W. Dixon
Book #129 in the The Hardy Boys series
A Hawaiian vacation turns into a perilous jewel hunt.
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Frank and Joe's Hawaiian getaway spirals into chaos when a dolphin is mysteriously injured and a scientist vanishes. As they delve deeper, they uncover a web of secrets and stolen jewels. Can they solve the mystery before it's too late?
Frank and Joe are in Hawaii at a dolphin research center, where they discover that one of the dolphins has suffered a suspicious injury and one of the researchers has vanished.
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