Keene, Carolyn. <br/><br/>
The invisible intruder. (Nancy Drew mystery stories, #46.) / 
Carolyn Keene. 
 - New York :  Grosset & Dunlap,  1969. 
 - 175 pages :  illustrations. 
 - Nancy Drew mystery stories ;  46 .
<br/><br/> Nancy Drew and her friends go on a ghost hunting expedition and become involved with a gang of thieves who concentrate their activities on collectors of valuable shells. 
<br/><br/><label>ISBN: </label>9780448095462 0448095467 
<br/><br/><label>LCCN: </label>69012166  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mystery and detective stories.--Juvenile fiction.<br/>Shells--Juvenile fiction.
<br/><br/><label>Dewey Class. No.: </label>jKee    82