Riordan, Rick <br/><br/>
The battle of the labyrinth 

 - Percy Jackson & the Olympians  v.4 .
<br/><br/> 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. 
<br/><br/><label>ISBN: </label>9781423101468