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

The Aldens take a train journey! And at every stop, someone has something to say about the train car the children are riding in. It turns out Caboose Number 777 has an unusual past--one that comes with its very own mystery!