Night Probe!

Heidi Milligan, an American naval commander, comes across an obscure reference to the North American Treaty while the United States is in the middle of an international crisis. The treaty is a secret pact between the United States and Great Britain, and nobody has heard of it for generations.

The President sees the pact as the one chance to rescue a nation short of energy and battered economically. The difficulty is that both copies of the document were lost in two separate disasters and now lie somewhere beneath the Atlantic.

The task of finding the original falls to Dirk Pitt, the one American judged able to do it. His mission is to raise the treaty from the ocean floor.

In London, a counterplot is already taking shape. Brian Shaw, a veteran spy who has often worked alongside American agents, takes charge of an operation to make sure the treaty is never put into effect.

The two missions run directly against each other: Pitt must recover the document, and Shaw must stop him. It is a thriller of salvage and espionage, with an underwater search set against a spy's scheme.