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.