Blyton, Enid <br/><br/>
Mystery of the spiteful letters 

 - London:  Hodder Children's Books,  2016 
 - 197 p. 
<br/><br/><label>ISBN: </label>9781444955194 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Film & TV
<br/><br/><label>Dewey Class. No.: </label>823.912  / B629M