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 a rescue operation. He is then tapped to lead a research crew on behalf of the U.S. National Underwater and Marine Agency to further study these uncanny artifacts. And that�s when his ship is set upon and nearly sunk by an impossibility�a vessel that should have died 56 years before.
 
Clearly, another group knows about the relics of this long-forgotten but highly-advanced seafaring culture. And they�ll stop at nothing to keep the rest of the world in the dark.
 
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