Riordan, Rick. <br/><br/>
The house of Hades / 
Rick Riordan. 
 - First edition. 
 - 597 pages ;  22 cm. 
 - Heroes of Olympus ;  book four .
<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>9781423146728 (hardback) 
<br/><br/><label>LCCN: </label>2013015946 
<br/><br/><label>Subjects--Personal Names: </label><br/>Hera (Greek deity) --Fiction.<br/>Gaia (Greek deity) --Fiction.
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mythology, Roman--Fiction.<br/>Mythology, Greek--Fiction.<br/>Giants--Fiction.<br/>Camps--Fiction.<br/>JUVENILE FICTION / Fantasy & Magic.<br/>JUVENILE FICTION / Action & Adventure / General.<br/>JUVENILE FICTION / Legends, Myths, Fables / Greek & Roman.
<br/><br/><label>LC Class. No.: </label>PZ7.R48298  / Hou 2013 
<br/><br/><label>Dewey Class. No.: </label>[Fic]