Riordan, Rick. <br/><br/>
The house of Hades / 
Rick Riordan 
 - New York :  Disney - Hyperion Books,  c2013 
 - 597 pages ;  20 cm. 
<br/><br/> Greek and Roman demigods from the Prophecy of Seven must work together to seal the Doors of Death--and help Percy and Annabeth escape the Underworld in the process. 
<br/><br/><label>ISBN: </label>9781423146773 
<br/><br/><label>Subjects--Topical Terms: </label><br/>ACTION AND ADVENTURE -- FICTION
<br/><br/><label>LC Class. No.: </label>FIC .R56 2013