Riordan, Rick. <br/><br/>
Heroes of Olympus:  The Mark of Athena / 
Rick Riordan. 
 - London:  Puffin Books,  2012. 
 - 584 p.  20 cm. 
 - Heroes of Olympus.  3. .
<br/><br/> "The Greek and Roman demigods will have to cooperate in order to defeat the giants released by the Earth Mother, Gaea. Then they will have to sail together to the ancient land--Greece itself--to find the Doors of Death"-- 
<br/><br/><label>ISBN: </label>9780141335766 
<br/><br/><label>LCCN: </label>2012017264 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mythology, Roman.Mythology, Greek. Giants. Camps. Hera (Greek deity). Gaia (Greek deity).--Fiction.
<br/><br/><label>LC Class. No.: </label>PZ7.R4829  / Mar 2012 
<br/><br/><label>Dewey Class. No.: </label>[Fic]