Riordan, Rick. <br/><br/>
The mark of Athena 
Rick Riordan 
 - 1st U.S. pbk. ed., 2014. 
 - [S.l.]  Scholastic  2012 
 - 586 p. 
 - Heroes of Olympus .
 - Heroes of Olympus .
<br/><br/><label>ISBN: </label>1423142004 9780545782814