"The Big Three plus One," the best private eye, ear, nose, and mouth in the world, search for Mrs. Piper's lost pearl.

The Big Three Plus One detective team searches for clues that will solve the mystery of Mrs. Piper's lost pearl.

On their vacation to Hawaii, the Aldens learn about the curse of the black pearl. But whenever they ask to hear the whole story, no one will talk about it. Can the Boxcar Children find out the secret behind the curse?

When the Aldens learn about a burglary at an antique store, they set out to find who stole some jewelry. But then the thief strikes again—at their own house! This time, Benny's favorite cereal has been taken! Why would a jewel thief take a cereal box?

When Benny and Henry get summer jobs at a department store in town, they don't expect to be solving mysteries at work. But when an expensive vase disappears, the salespeople receive strange notes, and the jewelry display is tampered with, it's up to Benny to uncover the truth!

Four brave siblings were searching for a home – and found a life of adventure! Join the Boxcar Children as they investigate the mystery of the yellow house in the third book in this illustrated chapter book series beloved by generations of readers. A mystery surrounds the old yellow house on Surprise Island! Years ago, a man vanished from the house, and no one knows how or why. Now a long-lost clue leads the Aldens to investigate the mystery—and to a new adventure! What started as a single story about the Alden Children has delighted readers for generations and sold more than 80 million books worldwide. Featuring timeless adventures, mystery, and suspense, The Boxcar Children® series continues to inspire children to learn, question, imagine, and grow.

The Aldens are helping one of Grandfather's friends break a world record by building the world's largest yo-yo! As they help with the project, strange things begin to happen. First someone follows them, and then the plans for the yo-yo turn up missing. Someone is trying to sabotage the yo-yo before it's launched! It seems there are a few people in Greenfield who don't want this yo-yo completed. The Boxcar Children will piece the evidence together to get to the bottom of this mystery.