Keene, Carolyn <br/><br/>
The hidden staircase / 
Carolyn Keene. -- 
 - New York :  Grosset & Dunlap, Inc.,  c1987. 
 - 182 pages :  illustrations ;  20 cm. 
 - Nancy Drew Mystery Stories. .
<br/><br/><label>ISBN: </label>0448095025 
<br/><br/><label>Dewey Class. No.: </label>FIC K265h 1987