"by Carolyn Keene" <br/><br/>
The clue in the crossword cipher 

 -  New York : Grosset & Dunlap, c1967.  2002 
 - 177 
<br/><br/><label>ISBN: </label>9780448095448 
<br/><br/><label>Dewey Class. No.: </label>F823  / 2421