Title: Mystery Behind the Wall
First published: 1973
Description: A young Canadian visitor helps the Alden family solve a mystery involving a lost coin collection.
Subjects: Juvenile fiction, Orphans, Fiction, Boxcar children (Fictitious characters), Brothers and sisters, Family, Mystery and detective stories, Coins, Family life, Detective and mystery stories, Collectors and collecting, Families, Boxcar children (fictitious characters), fiction, Orphans, fiction, series:BoxcarChildren, collectionID:Boxcar1, Siblings, fiction, Family, fiction, Children's fiction
LC classification: PZ7.W244 Mv