The body parts were first discovered in the bellies of sharks. Mary and scientist in the Florida Keys insist sharks really dying on live humans, so there can only be one explanation. They were dead before they hit the water. Dr Jessica corn knows why. They call them the Nightcrawler and he's out there, right in the tides with his victims, feeding the waves after his own perverse hunkers are satisfied. But when similar murder surface in london, on the Thames River, Jessica faces double jeopardy. One killer? Or two