"Three cheers, Secret Seven" 
Three cheers Secret Seven 
 -  107 p. : ill. ; 18 cm : pbk. 
 - London  Hodder Children�s Books  2015 
<br/><br/><label>ISBN: </label>9780340893142 
<br/><br/><label>Dewey Class. No.: </label>823.912 BLY  / 22.823.912 BLY