The last olympian /  Rick Riordan.  

 - New York :  Scholastic Inc,   c2009.   
 - 381p. 
 -  Percy Jackson & The Olympians, Book Five   .
<br/><br/><label>ISBN: </label>9780545272629 
<br/><br/><label>Dewey Class. No.: </label>FIC R479lo 2009