This boxed set includes the following titles: When four orphaned children find an abandoned boxcar in the woods, they decide to call it home—and become the Boxcar Children! : As the Alden children explore their summer home, they realize there is more to the island—and to a new friend—than meets the eye. : A long-lost clue leads the Alden children to a mysterious old house while on summer vacation. The Alden children make a discovery that leads them to investigate a mystery involving their family ranch. 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 classic illustrations, The Boxcar Children® series continues to inspire children to learn, question, imagine, and grow.