Enid Blyton <br/><br/>
"The Secret seven: Good work, Secret Seven" 

 - India  Enid Blyton ltd  1954 
 - 102 p. ; 18 cm. 
<br/><br/><label>ISBN: </label>9780340893081 
<br/><br/><label>Dewey Class. No.: </label>BLY