The "Boxcar Children" is a popular children's book series created by Gertrude Chandler Warner. The story follows four orphaned siblings—Henry, Jessie, Violet, and Benny—who run away to live in an abandoned boxcar in the woods. They learn to take care of themselves while solving various challenges and mysteries. The series emphasizes themes of family, resourcefulness, and adventure. Over the years, it has expanded to include numerous titles, adaptations, and even a television series. The books are beloved for their engaging plots and relatable characters, making them a staple in children's literature.