Riordan, Rick <br/><br/>
The demigod files / œc Rick Riordan ; [illustrations by Steve James] 

 - London :  Penguin Books,  2009 
 - 171 p. :  ill. ;  18 cm. 
 - Percy Jackson .
<br/><br/><label>ISBN: </label>9780141329505 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mythology, Greek--Fiction<br/>Monsters--Fiction<br/>Animals, Mythical--Fiction<br/>Camps--Fiction