Riordan, Rick, <br/><br/>
The blood of olympus :  The heroes of olympus / 
RicK Riordan . 
 - New York :  Hyperion, 
 - 516 pages :  22 cm. 
<br/><br/> The Greek and Roman demigods must simultaneously prevent the Earth Mother, Gaea, from waking and stop war from breaking out at Camp half-blood. 
<br/><br/><br/>English 
<br/><br/><label>ISBN: </label>9781423146735 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mythology, Greek - fiction, Mythology,Roman - fiction, Gaia(Greek deity)- fiction
<br/><br/><label>Dewey Class. No.: </label> / R47