The body parts were first discovered in the bellies of sharks. Marine scientists in the Florida Keys insist sharks rarely dine on live humans, so there can be only one explanation: They were dead before they hit the water. Dr. Jessica Coran knows why. They call him the "Night Crawler." And he's out there, riding the tides with his victims, feeding the waves after his own perverse hungers are satisfied. But when similar murders surface in London, on the Thames River, Jessica faces double jeopardy. One killer? Or two...