Cyclops

Comic-strip specialist Cussler (Raise the Titanic!) returns with as implausible a tale as he can invent, again featuring death-proof underwater-recovery mariner Dirk Pitt. An antique blimp carrying multimillionaire publisher Raymond LeBaron is searching for the US Navy collier Cyclops, which went down in the Caribbean in 1918, when the blimp loses radio contact with land and disappears for 10 days ...
Shocked to discover that a covert group of U.S. industrialists has put a colony on the moon, Dirk Pitt becomes a key figure in an international conspiracy in which he is the only one who can stop a Russian attack. Reissue."