Raise the Titanic! (Vintage Paperback) by Clive Cussler

On orders from the Pentagon, marine explorer Dirk Pitt must salvage crucial material from the world's most infamous maritime disaster in this novel in the #1 New York Times-bestselling series.

The President's secret task force has developed an unprecedented defensive weapon that relies on an extremely rare radioactive element—and Dirk Pitt has followed a twisted trail to a secret cache of the substance. Now, racing against brutal storms, Soviet spies, and a ticking clock, Pitt begins his most thrilling mission—to raise from its watery grave the shipwreck of the century...