- Written by Gertrude Chandler Warner
- Narrated by Tim Gregory
- Audiobook
- ISBN: 9781621881599
- 1 hour 53 minutes
- 9–12 years old
- Included in All Memberships
Mystery Behind the Wall
Oasis Audio ● The Boxcar Children Mysteries
The Aldens have found a mystery under their very own roof! When the children found an old journal behind the closet wall in the guest room, they never dreamed it would lead them on a search for valuable coins. What happened to the girl who wrote the journal — and what is she trying to tell them?
