R. Karl Largent's title refers to the Sargasso, a patch of the Atlantic famous for its floating weed. This setting has unusually high significance to the events of this "techno-thriller". It is beneath the surface amid the sargassum and "swarm quakes" as well as the above-surface fog that the villains perpetrate their deceit. The protagonist, Elliott Wages, is a thoughtful and, as we discover, vulnerable sort that relates the action in the first person. A salvage expedition (treasure hunt) is being sabotaged and Elliott assumes the task of peeling the onion. The reader is privy to his suspicions and discoveries, making for a very quick read. I enjoyed this story and consider it reminiscent of the best classic mysteries, if not a little too formula. In spite of the occasional credibility stretch the premise is not all that far-fetched. Very entertaining.