Vespers rising 
Rick Riordan ... [et. al.]. 
 - New York :  Scholastic,  2011. 
 - 238 p. :  ill. ;  20 cm. 
 - 39 clues ;  bk. 11 .
<br/><br/> Some editions may contain 6 game cards. 
<br/><br/> Amy Cahill and her brother Dan thought they could return to their regular lives when they found the 39 clues, but the Vespers, powerful enemies, will stop at nothing to get the clues. And with the Vespers rising, the world is in jeopardy. 
<br/><br/><label>ISBN: </label>9780545326063 (hbk.) 0545326060 (hbk.) 9780545290593 0545290597 
<br/><br/><label>LCCN: </label>2010939561 
<br/><br/><label>Subjects--Personal Names: </label><br/>Cahill, Amy (Fictitious character)--Juvenile fiction.<br/>Cahill, Dan (Fictitious character)--Juvenile fiction.
<br/><br/><label>Subjects--Topical Terms: </label><br/>Brothers and sisters--Juvenile fiction.<br/>Orphans--Juvenile fiction.<br/>Family secrets--Juvenile fiction.
<br/><br/><label>Index Terms--Genre/Form: </label><br/>Mystery fiction.
<br/><br/><label>Dewey Class. No.: </label>[Fic]