Question: The Owl Service is a low fantasy novel for young adults by what English novelist, best known for his children's fantasy novels and his retellings of traditional British folk tales?

full_context: Document 1: The Riddle of the Wren: The Riddle of the Wren is a Celtic fantasy novel written by Canadian author Charles de Lint. Published in 1984 by Ace Books, it was de Lint's first novel. It was republished in 2002 by Firebird Fantasy, an imprint of Penguin Group. "The Riddle of the Wren" is set in an alternate universe, and is heavily influenced by the works of J. R. R. Tolkien, particularly "The Hobbit". The novel's main character Minda Sealy journeys into other worlds to confront Ildran the Dream-master and save the Lord of the Moors.
Document 2: The Owl Service (band): The Owl Service was an English alternative folk music collective formed in 2006 by multi-instrumentalist Steven Collins (who led the band for its entire 10 year duration), named after the 1967 novel by Alan Garner.
Document 3: Elidor: Elidor is a children's fantasy novel by the British author Alan Garner, published by Collins in 1965. Set primarily in modern Manchester, it features four English children who enter a fantasy world, fulfill a quest there, and return to find that the enemy has followed them into our world. Translations have been published in nine languages and it has been adapted for television.
Document 4: The Owl Service (TV series): The Owl Service is an eight-part television series based on the fantasy novel of the same name by Alan Garner. Produced in 1969 and televised over the winter of 1969–1970, the series was remarkably bold in terms of production. It was the first fully scripted colour production by Granada Television and was filmed almost entirely on location at a time when almost all TV drama was studio-bound. It used editing techniques such as jump cuts to create a sense of disorientation and also to suggest that two time periods overlapped. For the series, the book was adapted in seven scripts (later stretched to eight) by Garner and was produced and directed by Peter Plummer. The direction was quite radical and seemed to be influenced by the avant-garde, a noted contrast to what might be expected of a children's serial.
Document 5: Boneland: Boneland is a 2012 novel by Alan Garner, a sequel to "The Weirdstone of Brisingamen" and "The Moon of Gomrath". The boy Colin from the earlier novels is now an adult, still living near the top of Alderley Edge but now a Professor working at the nearby Jodrell Bank Observatory. His solitary home is a kit-built hut ("A Bergli") in a quarry. He has a form of amnesia which means he remembers nothing from before the age of 13, including his twin sister and his childhood adventures. He visits a psychotherapist and the gradual uncovering of his past forms the main story.
Document 6: The Blue Sword: The Blue Sword is a fantasy novel written by American author Robin McKinley and published by Greenwillow Books in 1982. The novel "The Hero and the Crown" serves as a prequel. "The Blue Sword" has received several awards, including: Newbery Honor Award, ALA Best Book for Young Adults and the ALA Notable Children's Book. The story, told in the third-person omniscient perspective, is of a young woman named Angharad Crewe, called Harry, who becomes a warrior in her adopted homeland of Damar.
Document 7: Strandloper (novel): Strandloper is a novel by English writer Alan Garner, published in 1996. It is loosely based on the story of a Cheshire labourer, William Buckley. The historical figures of Edward Stanley and John Batman also appear as characters in the novel.
Document 8: Alan Garner (disambiguation): Alan Garner is an English author.
Document 9: The Weirdstone of Brisingamen: The Weirdstone of Brisingamen: A Tale of Alderley is a children's fantasy novel written by the English author Alan Garner (born 1934). Garner began work on the novel, his literary debut, in 1957 after he moved into the late mediaeval house Toad Hall, in Blackden, Cheshire. The story, which took the local legend of The Wizard of the Edge as a partial basis for the novel's plot, was influenced by the folklore and landscape of the neighbouring Alderley Edge where he had grown up. Upon completion the book was picked up by the publisher Sir William Collins who released it through his publishing company Collins in 1960.
Document 10: The Owl Service: The Owl Service is a low fantasy novel for young adults by Alan Garner, published by Collins in 1967. Set in modern Wales, it is an adaptation of the story of the mythical Welsh woman Blodeuwedd, an "expression of the myth" in the author's words.
Document 11: Alan Garner: Alan Garner OBE (born 17 October 1934) is an English novelist best known for his children's fantasy novels and his retellings of traditional British folk tales. Much of his work is firmly rooted in the landscape, history and folklore of his native county of Cheshire, North West England, being set in the region and making use of the native Cheshire dialect.
Document 12: Childe Rowland: "Childe Rowland" is a fairy tale, the most popular version written by Joseph Jacobs in his "English Fairy Tales", published in 1890. It was based on a Scottish ballad, which is why the text alternates between prose and rhyming stanzas. Joseph Jacobs called the King of Elfland's palace "the Dark Tower" in his version, an addition he made that was not part of the original ballad. This harks to Shakespeare's "King Lear" and Robert Browning's poem "Childe Roland to the Dark Tower Came," but neither of those references have any relation to the fairy tale.
Document 13: The Moon of Gomrath: The Moon of Gomrath is a fantasy story by the author Alan Garner, published in 1963. It is the sequel to "The Weirdstone of Brisingamen".
Document 14: St James' and St Paul's Church, Marton: The Church of St James and St Paul is situated to the south of the village of Marton, Cheshire, England. It is recorded in the National Heritage List for England as a designated Grade I listed building. It is an active Anglican parish church in the diocese of Chester, the archdeaconry of Macclesfield and the deanery of Congleton. Its benefice is combined with those of Holy Trinity, Capesthorne, Christ Church, Eaton, and All Saints, Siddington. The church is an important location in the novel Strandloper by Alan Garner.
Document 15: Owd Grandad Piggott: Owd Grandad Piggott is a fictional character created by author Alan Povey based on a real life person. The Owd Grandad Piggott stories are best known in Povey's home town of Stoke-on-Trent where they have often been heard on BBC Radio Stoke, read by the author. Owd Grandad Piggott is noted for having a broad Staffordshire accent and speaks in an old Potteries dialect.
ground_truth: Alan Garner