Book 3 in the Conrad Yeats/Serene Serghetti series of action thrillers.
"The adventure begins with the wreckage of a sunken Nazi submarine and a shocking legacy of Hitler's quest for Atlantis. Archaeologist Conrad Yeats discovers in the ruins of the Third Reich the key to an ancient conspiracy that reaches the highest levels of every major government. Suddenly Yeats is plunged into a deadly race across the Mediterranean, hunted by the assassins of an international organization that will stop at nothing to ignite global Armageddon and revive an empire. And only Serena Serghetti, the beautiful Vatican linguist he loved and lost, can help him save the world from the Atlantis Revelation."
Sam Deker comes into the action late in this adventure but plays a very important part.