“McBride writes with the perfect mixture of suspense and horror that keeps the reader on edge.” —Examiner   IT HAS SURVIVED At a research station in Antarctica, scientists discovered a strange and ancient organism. They thought they could study it, classify it, control it. They couldn’t.   IT HAS THRIVED Six months ago, a secret paramilitary team called Unit 51 was sent to the station. They thought the creature was dead, the nightmare was over. It wasn’t.   IT HAS EVOLVED In a Mexican temple, archeologists uncover the remains of a half-human hybrid. They believe it is related to the creature in Antarctica, a dark thing of legend that is still alive—and still evolving. They believe it needs a new host to feed, to mutate, to multiply. They’re right. And they’re next. And the human race might just be headed for extinction  . . .   “Highly recommended for fans of creature horror and the thrillers of Michael Crichton.” —The Horror Review   “Thriller powerhouse McBride begins his Unit 51 series . . . neatly executes a sudden shift of mood and tone toward frantic horror when the story flips into a race to escape from savage human-alien hybrid predators in a confined space, evoking feelings of shock and terror.” —Publishers Weekly on Subhuman “This novel is for everyone who’s still a little scared of the dark . . . a very good sci-fi/thriller; I’ll read whatever McBride writes next.” —Ken Raymond, The Oklahoman on Subhuman.