The Boxcar Children take a bus trip to the Science and Hobby Fair, but a bad storm forces them to stay at a bus station along the way. Soon they are in the middle of a mystery involving a polluted river, two strange boys, and a suspicious bus-station manager. 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.