An unidentified artifact, found seven miles below the surface of the sea, stumps the scientists examining it but calls out to the two immortal creatures who have wandered the Earth for centuries, never crossing paths until now.

Doc Ford's goddaughter Shay, who had been thrown a wild bachelorette party by her bridesmaids, receives a note from a blackmailer wanting money for a secret videotape of the party; Ford makes the exchange of money, but the blackmailer, a woman, is just getting started with her plan.

While investigating a toxic outbreak in the Caribbean Sea that may ultimately threaten the United States, Pitt unwittingly becomes involved in something even more dangerous--a post-Castro power struggle for the control of Cuba. Meanwhile, Pitt's children, marine engineer Dirk and oceanographer Summer, are on an investigation of their own, chasing an Aztec stone that may reveal the whereabouts of a vast historical Aztec treasure. The problem is, that...

France, May 1940. As the German army blitzes Europe and Parisians flee their city, the chief curator of the Musee de l'Armee is ordered to take a mysterious piece of cargo out of the country. But when he learns his intended ship has been sunk, the fate of his cargo must rest on a decrepit steamer, sailing out under German fire...Decades later, a diving expedition in the English Channel leads Director Dirk Pitt to a cache of uncut diamonds on a shipwreck....

"Following a mysterious murder on an island off the coast of Vietnam, a research team convenes to study an octopus community that seems to be developing its own language and culture. Humans, AIs, and animals are swept up in the machinations of governments and corporations in this near-future thriller about the nature of intelligence"--