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Publisher's Summary

Dive into adventure in the last unknown territory on Earth - the sea. Join Robby Hoenig and a cast of characters as unusual as any ever met on a distant planet…
In the third Robby Hoenig adventure, Secret under the Caribbean, the key to a baffling puzzle - and the truth about a mysterious monster - are locked inside a sunken Spanish ship…
Gordon R. Dickson's Robby Hoenig adventures are timeless young adult stories in the tradition of Arthur C. Clarke's Dolphin Island.
©1964 Gordon R. Rickson (P)2014 Audible Studios
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