The lost hero /   Rick Riordan.   

 - NY :  Hyperion Books,  c2010.  
 - 557p. 
 -  The Heroes of Olympus; bk.1   .
<br/><br/><label>ISBN: </label>9781423155379   
<br/><br/><label>Dewey Class. No.: </label>FIC R585lo 2010