The Battle of the Labyrinth- Riordan

I read this one over Spring Break as well. I can't wait for the next Percy Jackson book! I am totally hooked on this series. The action moves underground to a contanstly changing Labyrinth (maze) that is full of monsters and traps. Percy Jackson, half-blood son of Poseidon, enters the Labyrinth with Annabeth (daughter of Athena), Tyson (a Cyclops), and satyr Grover. There, they uncover a plot to invade Camp Half-Blood. The melding of Greek myths with modern-day settings remains fresh and funny in this fourth installment, as the friends draw nearer to the foreshadowed showdown against Kronos and renegade half-blood Luke.