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. It reappears, manned by dessicated dead men, floating toward the Sonesta Hotel in Key Biscayne. Pitt, who is enjoying himself sailboarding, spots the colossus and snags a line from it, just averting a tragedy. Later, Mrs. LeBaron refuses to identify one of the dead, who is wearing her husband's clothes and jewelry, as LeBaron. As it happens, the three substitute corpses are Soviet cosmonauts whose bodies had been recovered and frozen a year ago. By whom? Meanwhile, the President is buttonholed by a caddy on a golf course who pretends to be carrying a bomb and reveals a fantastic private enterprise scheme which placed a US team on the moon six years ago and is now about to return its men to earth and go public. But the Russians are also establishing their own team on the moon! What is the connection between Cyclops and the moon colony? Only that LeBaron is among the rich founders of the colony, and had hoped to recover from the collier a secret treasure: a six-foot solid gold goddess with a 30-pound emerald for a head and giant ruby in her breast, stolen from a wealthy native tribe. But when Pitt locates and boards the sunken ship, the statue is missing. Also, the Russians have a ship loaded to the gills with explosive ammonium nitrate in Havana harbor and plan to blow up Havana and Castro in a tremendous fireball. Castro now wishes to establish peace with Washington. Can Pitt save Havana? As a matter of fact, he doesn't altogether and is himself caught up in the fireball. But he's immortal, right? Nicely paced junk, expertly set in motion for ultraescapists who like hollow noises between their ears.