Blyton, Enid <br/><br/>
Puzzle for the Secret Seven  eng 

 - London  Hodder Children's Books, an imprint of Hachette Chilren's Group, part of Hodder & Stoughton  2009 
 - 138 
 - Secret Seven .
<br/><br/><label>ISBN: </label>9781444936674 
<br/><br/><label>Dewey Class. No.: </label>823.912  / BLY-P