No. 1 "New York Times" bestselling author Iris Johansen last electrified readers with "Dead Aim". Now she offers a pulse-pounding thriller that takes suspense writing to an all-new level: deep below the surface, where a ruthless killer strikes without warning, without mercy ...and with the deadliest intent. When marine researcher Melis Nemid moved to her own Caribbean island and devoted herself to the study of dolphin behavior she hoped to put behind her a nightmarish past torn by violence. But it soon becomes clear that Melis is treading dangerous waters - and is about to be dragged under. Someone is cutting a path of destruction and death that leads directly to her door - and whoever it is knows exactly how to scare her ...Only one person can help - a fellow oceanographer. But what does this enigmatic man really want? And can he be trusted? Melis may not be sure until it's too late, but her options are limited. Already she's being forced to relive her nightmares all over again ...