When the children uncover a strange puzzle in a friend's back yard, it's the start of a "spy game" leading to gold. But first they must make sense of an old photo and a riddle, and learn just who is behind this mystery within a mystery.

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

The Aldens spend their summer traveling in a houseboat! But when a black car shows up at every place they dock, the children begin to think someone is after something on the boat. Can the Boxcar...

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

The Aldens are excited to meet their favorite celebrity Walter the Cat, who makes the funniest videos on the Internet! And when this celebrity cat inherits a million dollars from his owner, he becomes even more famous! But someone seems to be angry about the will and is stealing things from Walter's house. Is this cat too famous for his own good?

Jessie wants her science fair project to make a difference. So when she gets the chance to test a local creek for pollution, she can't wait to get started. But when things start going wrong with her experiment, Jessie and her siblings don't just have an experiment to investigate, they have a mystery to solve!

The Aldens are helping out at a rescue ranch for horses. Jessie's favorite is a beautiful horse named Dragon. When Dragon and other horses disappear from the pasture, the Boxcar children must saddle up for a mystery. What's happening to the horses at the Dare To Dream Ranch?

The Alden children and their grandfather are hiking down from Flat Top when a rockslide reveals a cave with a big secret.

While participating in the Great Greenfield Bake-Off, Jessie and Benny believe that someone is stirring up trouble and must expose the culprit before the contest is ruined.

"The Aldens are on a special vacation up north to see the Calgary Stampede -- a cowboy celebration of Canada's frontier spirit! There's a parade through the streets of Calgary, a spectacular stage show, and plenty of fun things to do. But behind the scenes at the festival, an important piece of jewelry goes missing. Can the Boxcar Children find the thief before the big show is ruined?".

The Alden children discover another mystery when the agree to help injured Mr. Yee tend to his plot in the community garden and find out that vegetables are going missing and plots are being vandalized.