He studies the ocean. He fears the sky. He may be the only thing machines can't predict.

Stealing a submarine is insane. Launching it to the moon though is far worse.

Mason Beckett failed his navy diving test this morning. His family is on the moon right now, running out of air. And every government on Earth has just decided a rescue mission is impossible.

Mason disagrees.

The quantum distortion has grounded every vehicle capable of a launch. Every vehicle except a submarine.

What follows is the most improbable rescue in human history, and the beginning of something far worse. Because something on the moon has been waiting. Something that has read every book, learned every war, and decided it knows what's best for us.

Mason isn't a soldier. He isn't a hero. He's a man coming to terms with grief who can't even look down from a height without freezing.

But he's headed somewhere that thing can't follow—and that makes him the most dangerous thing alive.

He came to the moon to save his family.

He'll have to save a lot more than that.

If Project Hail Mary made you root for a scientist out of his depth, and Armada kept you up past midnight, this is your next read.