McBride, Michael. Unit 51 novel

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

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