"Nearly two thousand years ago, an Eastern emperor charged a small group with safeguarding secrets powerful enough to change the history of mankind. They went down in legend as the Nine Unknown Men--and now two rival factions of their descendants are fighting a mighty battle. Both sides think they are saving the world, but their tactics could very well bring about the end of humankind. Soon, Juan Cabrillo and his team of expert operatives aboard the...

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,...

Marine explorer Dirk Pitt faces off against an elite army from an era gone-by in order to uncover the secrets of an ancient civilization in this #1 New York Times-bestselling series.
 
A group of anthropologists uncover strange inscriptions on the wall of a Colorado mine just as an explosion traps them deep within the earth. But their work won’t stay buried long. Dirk Pitt is on hand during the blast and quick to initiate...

The 1950 discovery of four bodies inside a sunken steam locomotive in a Montana lake gives way to the story of a murderous 1906 bank robber whose ruthlessness challenged Isaac Bell, a talented detective struggling to identify and capture the killer.