Riordan, Rick <br/><br/>
Heroes of olympus:  the mark of Athena / 
by Rick Riordan 
 - London :  Puffin Books,  2012.  2013. 
<br/><br/><label>ISBN: </label>9780141335742 9780141335759 9780141335766 
<br/><br/><label>Subjects--Topical Terms: </label>--Novel
<br/><br/><label>Subjects--Index Terms: </label>Detective and mystery fiction, English