The Three Investigators and the Super Whale

A stranded whale is housed in the private swimming pool of a certain Mr. Slater and is being trained there by Constance to locate her father's sunken boat. Why does a stranger want to thwart Slater's and Constance's plans? Does he perhaps know about the true mission of the clever whale - the Super Whale? This case turns into a turbulent and "wet" adventure for the Three Investigators!

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