"Carolyn Keene","NA" <br/><br/>
The Clue in the Crossword Cipher 

 - London  Armada,HarperCollins Publishers,  1992 
 - 159 
<br/><br/><label>ISBN: </label>9780006922384 
<br/><br/><label>Dewey Class. No.: </label>F823  / 747B