When demonic cheerleaders invade his high school, Percy Jackson hurries to Camp Half Blood, from whence he and his demigod friends set out on a quest through the Labyrinth, while the war between the Olympians and the evil Titan lord Kronos draws near.

"Prince Ruprecht is very upset that knights-in-training Tim and Belinda have thwarted his plans and ruined his chances with Princess Grace. So to get even, he has kidnapped the princess and trapped her in the most complicated, dangerous, complex, dastardly, biggest (okay, you get the point)...and scariest maze in all the world! Now it's up to Tim, Belinda, Ferkle, and Rover to fend off menacing beasts (like the minotaur), conquer treacherous obstacles...

Skull, the Shadow, and a few of the rat army escaped into Perodia, and now Tag and the other defenders must locate them, and also find their friend, Bod, who is still trapped in the Underland with the rest of the rat army.

When demonic cheerleaders invade his high school, Percy Jackson hurries to Camp Half Blood, from whence he and his demigod friends set out on a quest through the Labyrinth, while the war between the Olympians and the evil Titan lord Kronos draws near.

"When Karen moved to Mt. Olympus, she certainly didn't expect to start junior high with a bunch of gods and goddesses--let alone discover she's a demigoddess (who doesn't yet know her powers)! Having recently joined the school newspaper, Karen decides to investigate a mysterious online troll that goes by the moniker M1N0T4UR. This leads her to a treacherous maze beneath the school where Karen and her friends must complete a set of phases to leave...