Knowe is much more fantasy-based in this novel: the children see flying horses, meet a giant, and witness a Bronze Age moon ceremony. The subtext, of homeless children being protected and healed by the house and its enchantments, is particularly strong. A Stranger at Green Knowe (1961) The Chinese boy Ping has returned to Green Knowe alone to stay with Mrs. Oldknow. During a visit to a zoo in London before his arrival at Green Knowe, he is fascinated by the giant gorilla Hanno; as a refugee, Ping feels a powerful bond. After Hanno escapes from the zoo and makes his way to Green Knowe, Ping befriends him. The early chapters of the book detail Hanno's life as a young gorilla in Africa, and the trauma and cruelty of his capture, with great compassion and finesse. A Stranger at Green Knowe was awarded the 1961 Carnegie Medal. An Enemy at Green Knowe (1964) This novel takes a darker turn than previous novels in the series. Both Tolly and Ping are staying at Green Knowe. Mrs. Oldknow tells them the story of Doctor Vogel, a tutor and necromancer who came to a diabolical end at Green Knowe centuries before. The next day, Professor Melanie D. Powers appears, hunting for Vogel's occult papers. Professor Powers' interest is far from academic, however, and a mounting confrontation between the holy magic of Green Knowe and the forces of Evil, represented by Melanie Powers, commences. The Stones of Green Knowe (1976) This novel, the last in the sequence, tells the story of Roger d'Aulneaux, the son of the original Norman settler who built the manor house of Green Knowe. Whilst exploring the overgrown countryside, Roger discovers two throne-like stones that allow him to access the turbulent time of the Conquest, then the later periods of Linnet, Susan, and Tolly, and they to visit him in turn. Reception In 1956, Anthony Boucher praised the first novel as "sheer literary magic: subtle, tenuous, enchanting and wholly convincing." In a study of "series fiction" at the turn of the century, Victor Watson opined that "A Stranger at Green Knowe is a masterpiece ... and in my opinion the greatest animal story in English children's literature". Generally, he praised Boston for "her ability 'to find exactly the right words, to groom her prose to glossy perfection'". Adaptations John Stadelman adapted Boston's first novel, The Children of Green Knowe, into