"The Railway Children" is a children's novel written by E. Nesbit, first published in 1906. The story follows three siblings, Roberta, Peter, and Phyllis, who move to the countryside after their father is wrongfully imprisoned. They live near a railway and spend their days exploring, making friends, and helping those in need. As the children become involved with the railway community, they encounter various adventures and challenges. Their kindness and bravery lead them to uncover the truth about their father's situation. The novel highlights themes of family, friendship, and the importance of standing up for what is right.