Warner, Gertrude Chandler. <br/><br/>
Mystery behind the wall / 
[by] Gertrude Chandler Warner ; ill. by David Cunningham. 
 - Niles, IL :  A. Whitman,  1973. 
 - 127 p. :  ill. ;  21 cm. 
 - Her The Alden family mysteries .
<br/><br/> A young Canadian visitor helps the Alden family solve a mystery involving a lost coin collection. 
<br/><br/> 3-6. 
<br/><br/><label>ISBN: </label>0807553670 0807553646 
<br/><br/><label>LCCN: </label>72013356 /AC 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Boxcar children (Fictitious characters)--Juvenile fiction.<br/>Orphans--Juvenile fiction.<br/>Family--Juvenile fiction.<br/>Boxcar children (Fictitious characters)--Fiction.<br/>Orphans--Fiction.<br/>Family--Fiction.<br/>Mystery fiction.
<br/><br/><label>LC Class. No.: </label>PZ7.W244  / Mv 
<br/><br/><label>Dewey Class. No.: </label>Fic