The Sharks Crisis Negotiator by John Robert McCauley

This is a tantalizing story of Josh Blake, United States State Department International Crisis Negotiator, who is diving on vacation in French Polynesia when he is dragged into the affairs of a mysterious redhead. That affair is interrupted by an international crisis, which requires him to go to Japan. He must peel back the layers of an international dispute between the Chinese and Japanese doing everything in his power to stop the unleashing of hell in the Far East. He tries to play fair in this complicated puzzle, and provides a neat solution with a twist to this long simmering dispute.