Riordan, Rick <br/><br/>
The demigod diaries / 
Rick Riordan. 
 - 1st ed. 
 - New York :  Disney/Hyperion Books,  c2012. 
 - 242 p. ; 18 cm. 
 - The heroes of Olympus .
<br/><br/><label>ISBN: </label>9781423163008