"Good work, Secret Seven" 
Good work Secret Seven 
 -  112 p. ; 18 cm. pbk 
 - London  Hodder Children's Books  2015 
<br/><br/><label>ISBN: </label>9780340893128 
<br/><br/><label>Dewey Class. No.: </label>823.0083 BLY  / 22.823.0083 BLY