Enid Blyton <br/><br/>
Five Have a Mystery to Solve (Famous Five #20) 

 - London  Hodder & Stoughton  1962 
 - 197p. ; 21 cm 
<br/><br/><label>ISBN: </label>9780340681251 
<br/><br/><label>Dewey Class. No.: </label>BLY