Percy Jackson isn't exactly surprised when his freshman orientation is disrupted by demonic cheerleaders. Being a half-blood, he's used to monsters tracking him down. And Kronos the Titan's power is getting stronger. But when he gets to Camp Half-Blood he learns of the newest danger that threatens his friends.
Kronos' lieutenant Luke is trying to find his way into Camp Half-Blood via the labyrinth, a vast network of shifting mazes and tunnels that sprawls across the entire United States. Percy and his friends must enter the labyrinth to stop the invasion before it starts—hoping, of course, that they don't get stuck wandering the labyrinth forever.
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