Haddix, Margaret Peterson. <br/><br/>
Among the enemy  
Margaret Peterson Haddix. 
 - New York :  Aladdin Paperbacks,  2006, c2005. 
 - 214 p. ;  20 cm. 
 - Shadow Children ;  6 .
<br/><br/> In a society that allows families to have only two children, third child Matthias joins the Population Police to infiltrate their system. 
<br/><br/> Ages 8-12. 
<br/><br/><label>ISBN: </label>0689857977 (pbk.)  5.99 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Conduct of life--Juvenile fiction.<br/>Conduct of life--Fiction.<br/>Science fiction.