How to break a dragon heart /   by Cressida Cowell.   

 - Neew York :  Little Brown & Company,  c2011. 
 - 299p 
 -  how to train your dargon; bk.8  .
<br/><br/><label>ISBN: </label>9780316176187 
<br/><br/><label>Dewey Class. No.: </label>FIC C8353hbdh 2011