Lasky, Kathryn <br/><br/>
Guardians of Ga'Hoole (Book 4): The Siege 

 - London  Harper Collins  2007 
 - 224p. 
<br/><br/><label>ISBN: </label>0-00-726402-5 
<br/><br/><label>Dewey Class. No.: </label>F  L335G