Book details
Mystery Behind the Wall
The Boxcar Children Mysteries, 1973 by Gertrude Warner
on Goodreads (2,677)
Description
The book revolves around the Alden children who discover a mystery behind a wall in their boxcar house. The children find an old journal that makes them curious about the wall's origins and what lies behind it. They embark on an adventurous journey to solve the mystery, discovering hidden treasures and learning about their family's history.