Clive Cussler: Raise the Titanic! (2004)

From the Publisher:
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...

Clive Cussler: Raise the Titanic! A Dirk Pitt Novel. Berkley Publishing Group, ISBN: 0425194523 (February, 2004), 448 p., $7.99.

Clive Cussler: Raise the Titanic! (1995)

From the Publisher:
The President's secret task force develops the ultimate defensive weapon. At its core: byzanium, a radioactive element so rare sufficient quantities have never been found. But a frozen American corpse on a desolate Soviet mountainside, a bizarre mining accident in Colorado, and a madman's dying message lead DlRK PITT -- to a secret cache of byzanium. Now he begins his most thrilling, daunting mission -- to raise from its watery grave the shipwreck of the century!

In a daring gamble, DIRK PITT locates the Titanic -- and suddenly his crew is in deadly jeopardy. Sabotaged by Russian spies and savage storms, Pitt must stop a diabolical plan for Soviet world supremacy -- or see the mighty Titanic blasted out of existence!

Clive Cussler: Raise the Titanic! A Dirk Pitt Adventure. Pocket Books, ISBN: 067172519X (January, 1995), 373 p., $7.99.