The Necronomicon lies on the ocean floor, but there are other dangers, other hidden copies. In that loathsome tome lie ways to contact creatures as far above Cthulhu as Cthulhu is above human kind. Elder gods who could destroy all reality in the blink of an eye. Death lies in wait for Doctor Archibald Shaw, recent survivor of the Titanic sinking. Danger, both new and familiar, unseen and overt, conspire to drag him deeper into the dark secret...