Keene, Carolyn. <br/><br/>
The hidden staircase / 
by Carolyn Keene. 
 - New York, NY :  Grosset & Dunlap,  1987, [1959] 
 - p.  cm. 
 - Nancy Drew mystery stories ; 2 .
<br/><br/><label>ISBN: </label>0-448-09502-5 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mystery fiction.