#1 New York Times bestselling author Clive Cussler delivers another swashbuckling NUMA adventure featuring a financier turned treasure hunter who vanishes mysteriously—and only Dirk Pitt can prevent an international incident that threatens to start a war. A wealthy American financier disappears on a treasure hunt in an antique blimp. From Cuban waters, the blimp drifts toward Florida with a crew of dead men—Soviet cosmonauts. Dirk Pitt discovers a shocking scheme: a covert group of US industrialists has put a colony on the moon, a secret base they will defend at any cost. Threatened in space, the Russians are about to strike a savage blow in Cuba—and only NUMA’s Dirk Pitt can stop them. From a Cuban torture chamber to the cold ocean depths, Pitt is racing to defuse an international conspiracy that threatens to shatter the earth!

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