The all-new novel of terror from 'one of the hottest horror authors on the planet' (Paste) and writer of the #HorrorBookTok sensation THE TROOP!Five dying people: On a remote island in the Canadian wilderness, five elderly volunteers are offering themselves up to an extraordinary secret experiment: they'll take a miracle drug, one that promises to stall the human biological clock or even reverse it, to restore lost youth. The chance to put death on pause, perhaps forever. One miracle cure: By harnessing an ancient and extraordinary biological agent, scientists can turn back time for their five patients. But this real-world fountain of youth is derived from the DNA of something with no heart, no mind and no conscience, something possessed with a single-minded purpose: the will to survive, whatever it takes. What could possibly go wrong: And as the experiment takes on a terrifying life of its own, those few who are able to fight back will have to use everything they've got just to stay alive . . . and human. A terrifying descent into mayhem, murder and madness from the twisted mind behind THE TROOP and THE DEEP.