Riordan, Rick <br/><br/>
The serpent's shadow 

 - London :   Puffin,   2013 
 - 405 p.  
<br/><br/> Despite their best efforts, Carter and Sadie Kane can't seem to keep Apophis, the Chaos snake, down. Their only hope: find an ancient spell that might turn the serpent's own shadow into a weapon 
<br/><br/><label>ISBN: </label>9780141335704 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Brothers and sisters--Juvenile fiction<br/>Magic--Juvenile fiction<br/>Mythology, Egyptian--Juvenile fiction<br/>Voyages and travels--Juvenile fiction<br/>Snakes --Juvenile fiction