The Aldens participate in a three-day bicycle ride and soon find that someone seems to be intent on keeping others from completing the event

Henry, Jessie, Vioet and Benny Alden are brothers and sisters - and tehy're orphans. The only way they can stay together is to make it on their own. One night, during a storm, the children find an old red boxcar that keeps them warm and safe. They decide to make it their home.

When an elderly friend is injured, the Alden children offer to help him with his window-washing business in their small town of Greenfield and agree to help him solve a riddle that has arrived in a mysterious invitation

The Aldens are spending a week at Camp Seagull on beautiful Claw Island. But as soon as camp begins, they realize that someone is not playing fair. Everything begins to go wrong for the Aldens they lose their luggage, Henry misplaces the camp flag, and the campers on the other team use one of Jessies ideas to score points for themselves. Are some campers so desperate to win the Olympics that they are willing to cheat? The Boxcar Children are...

Relates the exploits of the four Alden children as they locate a missing man. "Henry, Jessie, Violet, and Benny used to live alone in a boxcar. Now they have a home with their grandfather and are determined to solve the mystery that surrounds an old yellow house on his property. Strange things have happened in that house where long ago a man disappeared. When the Boxcar Children explore the house, they find an old letter written by the brother of...

The Alden children meet Mike Wood and a strange chain of events begins. Mike's house is mysteriously burned down, a man in a blue hat appears, and the Alden's uranium mine is in danger of being sabotaged. The four children solve the mystery.

While staying at the Winding River Lodge, the Alden siblings investigate tales of a zombie haunting a lake in the woods

The Aldens try to help a visiting Russian gymnast who is surrounded by mysterious people and events and who seems to have a secret

The Aldens are excited to be playing in their summer soccer league, until someone begins sabotaging the teams

When a professional hockey player comes to Greenfield with plans to build an ice skating rink, the Alden children suspect that someone in town wants to stop the project.