Mystery Behind the Wall

Four brave siblings were searching for a home – and found a life of adventure! Join the Boxcar Children as they investigate the mystery behind the wall in this illustrated chapter book series beloved by generations of readers.

When the Boxcar Children find a mysterious journal hidden behind the wall of the guest room, it leads them on a search for a valuable coin collection. But what happened to the journal's owner, and what is she trying to tell them?

What started as a single story about the Alden Children has delighted readers for generations and sold more than 80 million books worldwide. Featuring timeless adventures, mystery, and suspense, The Boxcar Children® series continues to inspire children to learn, question, imagine, and grow.