Henry Carter Hull

The Boxcar Children investigate when they find a secret message in their neighbor's path, a message that leads them on a hunt for a hidden object. 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.

Eccentric Aunt Jane needs help on her ranch so the Aldens, affectionately known as the boxcar children, get help from a private detective.

The Alden children find an unusual mystery when they spend a vacation on a supposedly deserted South Seas Island.

Henry, Jessie, Violet, and Benny spend the summer with their grandfather in a lighthouse on the New England coast. Jessie sees a mysterious woman walking on the grounds of the lighthouse late at night. Henry finds a puzzling note in the sand.

The Alden children set out to solve the mystery of who is trying to steal Mama Tova's secret cupcake recipe.

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 Alden children are thrilled when a famous orchestra comes to their town to perform, and when an original Mozart score turns up missing, they solve the mystery of its disappearance.

The Aldens try to find the thief who stole a very rare teddy bear from the toy hospital at the teddy bear festival.

When the Aldens have the chance to work at a candy factory, they try to find out who is sabotaging the candy and why.

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.