Griffiths, Andy.  <br/><br/>
The 39-Storey Treehouse. 

 - 1st Ed. 
 - New York :  Macmillan Children's Books,  2016. 
 - 344 p. 
<br/><br/><label>ISBN: </label>9781250077493 
<br/><br/><label>Dewey Class. No.: </label>823  / GRI