The Battle of the Labyrinth (Percy Jackson and the Olympians Series #4)

This thrilling New York Times bestselling series of modern-day mythology continues.

Time is running out as war between the Olympians and the evil Titan lord Kronos draws near. Even the safe haven of Camp Half Blood is growing more vulnerable. To stop them from invading, Percy and his demigod friends must go on a quest through the Labyrinth.