"The Children of Green Knowe" is a children's novel written by L.M. Boston. It tells the story of a young boy named Tolly who visits his great-grandmother's house, Green Knowe, an ancient manor filled with history and mystery. Tolly discovers that the house is inhabited by the spirits of children who lived there long ago. As Tolly explores the manor and its grounds, he befriends the ghostly children, including Ping, a Chinese boy, and Bramble and Alexander, siblings from the past. Together, they embark on adventures that reveal the rich history of the house and the importance of friendship and imagination.