Dixon, Franklin W <br/><br/>
The Hardy Boys -168  The Castle Conundrum 

 - New York  Aladdin Paperbacks  2001 
 - 150p 
 - The Castle Conundrum .
<br/><br/><label>ISBN: </label>9780743406833 
<br/><br/><label>Dewey Class. No.: </label>400