When the Aldens help a friend of their grandfather's to build the world's largest yo-yo, they soon discover that more than one person is trying to prevent them from finishing the job--and for more than one reason.

Four brave siblings were searching for a home – and found a life of adventure! Join the Boxcar Children as they investigate the mystery of a curious train caboose in this illustrated chapter book series beloved by generations of readers. The Aldens take a train journey! And at every stop, someone has something to say about the train car the children are riding in. It turns out Caboose Number 777 has an unusual past—one that comes with its very own mystery! 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 Boxcar Children tells the story of four orphaned children, Henry, Jessie, Violet, and Benny. They create a home for themselves in an abandoned boxcar in the forest. When a local baker and his wife learn that the children are orphans, they plan to send the children to live with their grandfather, but the children have been brought up to fear their grandfather, whom they have never met, because he did not like their parents' marriage. But their grandfather turns out to be a wealthy and kind man. He adopts children and moves the beloved boxcar to his backyard so they can use it as a playhouse.

Four brave siblings were searching for a home – and found a life of adventure! Join the Boxcar Children as they set out on their own in the first book in this illustrated chapter book series beloved by generations of readers. Henry, Jessie, Violet, and Benny are brothers and sisters. They're orphans too, and the only way they can stay together is to make it on their own. When the children find an abandoned boxcar in the woods, they decide to call it home—and become the Boxcar Children! 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.

Four brave siblings were searching for a home – and found a life of adventure! Join the Boxcar Children as they investigate the mystery of an old schoolhouse in this illustrated chapter book series beloved by generations of readers. The Aldens' friend Max says nothing interesting happens in Port Elizabeth. But when the children visit the small fishing village and come across a man snooping around the local library, they prove that every town has its mysteries. 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.

Four brave siblings were searching for a home – and found a life of adventure! Join the Boxcar Children as they investigate the mystery of Blue Bay in this illustrated chapter book series beloved by generations of readers. The Boxcar Children are on a trip with Grandfather to a beautiful island in the South Seas! The island is supposed to be deserted, but as the Aldens explore, they start to find signs that suggest they are not alone. Is there a castaway living somewhere on the island? 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.

When the Boxcar Children visit a neighbor’s house, a mysterious old wedding photo and a riddle lead them on a “spy game” devised long ago by the original owner of the house. When the children hunt for clues they discover amazing things, like a stone path whose pieces fit together into a jigsaw puzzle! But soon the children begin to suspect that there's a mystery inside the mystery. They read about a similar puzzle in one of their new Detective Club books, and they meet a woman who looks eerily like the bride in the old wedding photo. Just who is behind this spy game?