It's one of the stealthiest, most dangerous underwater warships ever built-and it's about to set off World War III. Silent at less than five knots and capable of a massive nuclear warhead punch, it's the 240-foot Russian Kilo Class submarine. Strapped for hard cash, the Russians have produced ten new Kilos for Beijing. The Chinese have already received three of the subs and now the last seven are ready to be delivered-a code-red situation the Pentagon...

"Dirk Pitt, death-defying adventurer and deep-sea expert, is put to the ultimate test as he plunges into the perilous waters of the Pacific Vortex." Pitt's job is to find Starbuck, America's deep-diving nuclear arsenal and salvage it before the sea explodes.

"1983. The US nuclear submarine USS Roanoke embarks on a classified spy mission into Soviet waters. Their goal: to find evidence of a new, faster, and deadlier Soviet submarine that could tip the balance of the Cold War. But the Roanoke crew isn't alone. Something is on board with them--something cunning and malevolent"--Publisher marketing.

When her brother is killed, brilliant marine architect Hannah Bryson must discover the volatile mystery behind a decommissioned Soviet submarine, Silent Thunder, that was recently purchased by the U.S. government for use as a maritime museum. Though the U.S. government tries to warn Hannah away, she'll stop at nothing to find the ruthless mastermind behind her brother's death. Even if it means joining forces with a mysterious man who may be even more...