The children, who are spending the summer in a lighthouse on the New England coast, are disturbed by a mysterious woman walking the lighthouse grounds. Jessie's dog Watch wakes up growling almost every evening at midnight, and Henry finds a puzzling note in the sand.

A family starts out on a one-day mountain climbing excursion that becomes very exciting. In fact, it becomes an adventure for the former "boxcar" family. They unearth some mysteries and have a fine time in the process.

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...

Two brothers take summer jobs at a department store where a series of peculiar events brings them under suspicion.

The Alden children, isolated in a storm at a small bus station, are led into a mystery centering on a polluted river.

The Boxcar children uncover a mystery on a train trip from Boston to San Francisco.

The Aldens are volunteering at the local recycling center, where they find plenty of things that can be reused, including a pinata that Benny takes home. But when the center is vandalized, the Boxcar children have a mystery to solve. Is there treasure amidst the junk?

A young Canadian visitor helps the Alden family solve a mystery involving a lost coin collection.

When the Aldens visit Yellowstone they discover a map showing the way to an old cabin where gold is supposedly hidden, but they encounter lots of interference in their attempts to hike the trail.

The Alden children hunt for their late grandmother's necklace that has been missing for years.