The Aldens are spending their first week of summer at Camp Quest in Colorado. The children are excited to learn about fossil hunting and paleontology from renowned scientist Dr. Iris Perez. But strange events at the camp make them wonder if the legends of a bigfoot-like creature roaming the valley might be more fact than fiction. Can the Aldens help Dr. Iris figure out who-or what-is causing such a stir?

Henry, Jessie, Violet, and Benny didn't think the old trunk in their house held anything interesting. But an unusual statue they find inside leads them to the Reddimus Society, a secret guild dedicated to returning lost treasures to where they belong.
Now the Aldens must help their new friends by traveling across the country with the statue and six mysterious boxes! Can the Boxcar Children keep these seven treasures out of the wrong hands?

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Henry, Jessie, Violet, and Benny are searching all over town for boxes but one of the club members may be a thief.

At a seaside resort, the Boxcar Children find a piece of map that leads to a pirates treasure. The whole resort goes treasure-map crazy as they try to find what old Charlie Morgan has buried.

The Aldens are spending a week at a rescue ranch that takes in horses whose owners can no longer care for them. The children help with chores, and Jessie looks after a horse named Dragon. But soon two of the oldest horses are missing from the pasture.

A hip new doughnut shop known for its bizarre recipes is opening up in Greenfield. At first, the owners of the other doughnut shop in town, Delilah?s, aren?t worried. But when the new shop starts making doughnuts that look just like some of Delilah?s greatest hits, the Boxcar Children must figure out if it?s just a coincidence or if someone from the new shop is stealing Delilah?s recipes.

Alice is running for mayor, and someone is using deception to try and beat her, so it's up to the Boxcar children to find out who's behind the dirty tricks.

Henry, Jessie, Violet, and Benny used to live in a boxcar. Now they have adventures everywhere they go! On a farm, the children find their oldest mystery yet!

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