The Dead Man and the Sea — Janice Steinberg

When the body was pulled from the water, Margo both feared and doubted that it could be Hob Schreiber's. The clothes looked like Hob's--but he was a skilled sailor as well as an oceanographer. The sea was his element. How could he have drowned? But as Margo later learns, death came before Hob ever hit the water--and at someone else's hands. The question is whose. Because between Hob's active love life, professional rivalries, and political activism, there are plenty of suspects to choose from--in a mystery as deep and dark as the Marianas...