Blyton, Enid <br/><br/>
The secret seven 

 - London  Hodder Children's  2002 
 - 119 
<br/><br/> It's their very first adventure, and the Secret Seven super-sleuths are already on the trail of some really weird clues. Its snowing and the Seven are dressed in disguise, following a lead to a spooky old house - and a mystery 
<br/><br/><label>ISBN: </label>9780340796368 
<br/><br/><label>Dewey Class. No.: </label>823  / BLY-S