Riordan, Rick <br/><br/>
The battle of the labyrinth / 
Rick Riordan. 
 - New York :  Disney/Hyperion Books,  c2008. 
 - 361 p. ; 20 cm. 
 - Percy Jackson & the Olympians ; bk.4 .
<br/><br/><label>ISBN: </label>9781423101499