Puzzle for the secret seven 
Puzzle for the secret seven 
 -  136p.;pbk 
 - London  Hoder Children's Book  2015 
<br/><br/><label>ISBN: </label>9780340893166 
<br/><br/><label>Dewey Class. No.: </label>823.0083 BLY  / 22.823.0083 BLY