Mull, Brandon <br/><br/>
Keys to the demon prison / 
Brandon Mull ; illustrated by Bradon Dorman. 
 - New York :  Aladdin,  c2010. 
 - 607 p. ; 20 cm. 
 - Fablehaven ; bk. 5 .
<br/><br/><label>ISBN: </label>9781606412381