Raise the Titanic!By: Clive Cussler Series: Dirk Pitt Adventure 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 elementand Dirk Pitt has followed a twisted trail to a secret cache of the substance.