Question: Who wrote the book series that includes a character known as Queen Susan the Gentle?

full_context: Document 1: Max McLean: Max McLean is the founder and artistic director of Fellowship for Performing Arts, a New York City-based producer of live theater from a Christian worldview. McLean conceived, adapted, produced and starred in "The Screwtape Letters", a play based on the book by Oxford and Cambridge scholar, author and fantasy writer C.S. Lewis. His stage adaptation of Lewis’ "The Great Divorce" launched its national tour in late 2013. McLean adapted, co-directed and starred in "C.S. Lewis Onstage: The Most Reluctant Convert", and co-wrote and produced "Martin Luther on Trial". McLean also is the narrator of The Listener's Bible.
Document 2: Prince Caspian (character): Prince Caspian (also known as Caspian X, King of Narnia, Lord of Cair Paravel and Emperor of The Lone Islands, Caspian the Seafarer, and Caspian the Navigator) is a fictional character in "The Chronicles of Narnia" by C. S. Lewis. He is featured in three books in the series: "Prince Caspian", "The Voyage of the Dawn Treader", and "The Silver Chair". He also appears at the end of "The Last Battle".
Document 3: Between Heaven and Hell (novel): Between Heaven and Hell: A Dialog Somewhere Beyond Death with John F. Kennedy, C. S. Lewis, & Aldous Huxley is a novel by Peter Kreeft about U.S. President John F. Kennedy, and authors C. S. Lewis ("The Chronicles of Narnia") and Aldous Huxley ("Brave New World") meeting in Purgatory and engaging in a philosophical discussion on faith. It was inspired by the fact that all three men died on the same day: November 22, 1963. We see from the three points of view: Kennedy's "modern Christian" view, Lewis's "conservative Christian" or "mere Christian" view, and Huxley's "Orientalized Christian" view. The book progresses as Lewis and Kennedy discuss Jesus' being God incarnate, to Lewis and Huxley discussing whether or not Jesus was a deity or "just a good person."
Document 4: Letters to Malcolm: Letters to Malcolm: Chiefly on Prayer is a book by C.S. Lewis posthumously published in 1964. The book takes the form of a series of letters to a fictional friend, "Malcolm", in which Lewis meditates on prayer as an intimate dialogue between man and God. Beginning with a discussion of "corporate prayer" and the liturgical service, Lewis goes on to consider practical and metaphysical aspects of private prayer, such as when to pray and where, ready-made prayer, petitionary prayer, prayer as worship, penitential prayer, and prayer for the dead. The concluding letter discusses "liberal" Christians, the soul and resurrection.
Document 5: C. S. Lewis: Clive Staples Lewis (29 November 1898 – 22 November 1963) was a British novelist, poet, academic, medievalist, literary critic, essayist, lay theologian, broadcaster, lecturer, and Christian apologist. He held academic positions at both Oxford University (Magdalen College, 1925–1954) and Cambridge University (Magdalene College, 1954–1963). He is best known for his works of fiction, especially "The Screwtape Letters", "The Chronicles of Narnia", and "The Space Trilogy", and for his non-fiction Christian apologetics, such as "Mere Christianity", "Miracles", and "The Problem of Pain".
Document 6: Eustace Scrubb: Eustace Clarence Scrubb is a fictional character in C. S. Lewis's Chronicles of Narnia. He appears in "The Voyage of the Dawn Treader", "The Silver Chair", and "The Last Battle". In "The Voyage of the Dawn Treader", he is accompanied by Edmund and Lucy Pevensie, his cousins. In "The Silver Chair" and "The Last Battle", he is accompanied by Jill Pole, a classmate from his school.
Document 7: Charn: Charn is a fictional city appearing in the 1955 book "The Magician's Nephew", book six in C. S. Lewis's Chronicles of Narnia, written as a prequel to "The Lion, the Witch, and the Wardrobe". Charn, and the world of which it is the capital city, are the birthplace of Jadis, the evil White Witch who later takes over Narnia. When visited briefly by Digory and Polly, the protagonists of the novel, the city is totally deserted, lifeless and crumbling, under a dying sun. Rivers have dried up, and neither weeds nor insects live. All life on the world of Charn had been destroyed by Jadis through an evil magic spell. In the novel the city stands as an example of the dead end that can result if a civilization succumbs to evil.
Document 8: Mr. Tumnus: Tumnus is a fictional character in C. S. Lewis' series "The Chronicles of Narnia". He is featured prominently in "The Lion, the Witch and the Wardrobe" and also appears in "The Horse and His Boy" and "The Last Battle". He is close friends with Lucy Pevensie and is the first creature she meets in Narnia, as well as the first Narnian to be introduced in the series. Lewis said that the first Narnia story, "The Lion, the Witch and the Wardrobe", all came to him from a single picture he had in his head of a faun carrying an umbrella and parcels through a snowy wood. In that way, Tumnus was the initial inspiration for the entire Narnia series.
Document 9: The Kilns: The Kilns, also known as C. S. Lewis House, is the house on the outskirts of Headington Quarry (where Lewis is buried at Holy Trinity Church) in the village of Risinghurst, Oxford, England, where the author C. S. Lewis wrote all of his Narnia books and other classics. The house itself was featured in the Narnia books. Lewis's gardener at The Kilns, Fred Paxford, is said to have inspired the character of Puddleglum the Marshwiggle in "The Silver Chair".
Document 10: Lantern Waste: Lantern Waste is a fictional place in "The Chronicles of Narnia" series by C. S. Lewis. It is a wood and is notable as the place where Lucy Pevensie and Mr. Tumnus meet, which is the first scene of Narnia described in the books. The lamppost in the wood is an iconic image of Narnia, and the question of its origin is what convinced Lewis to write more than one book on Narnia. One of King Edmund's titles is "Duke of Lantern Waste".
Document 11: The Chronicles of Narnia: The Chronicles of Narnia is a series of seven fantasy novels by C. S. Lewis. It is considered a classic of children's literature and is the author's best-known work, having sold over 100 million copies in 47 languages. Written by Lewis, illustrated by Pauline Baynes, and originally published in London between 1950 and 1956, "The Chronicles of Narnia" has been adapted several times, complete or in part, for radio, television, the stage, and film.
Document 12: Cair Paravel: Cair Paravel is the fictional castle where the Kings and Queens of Narnia rule in "The Chronicles of Narnia". It is the location of the four thrones of High King Peter the Magnificent, High Queen Susan the Gentle, King Edmund the Just, and Queen Lucy the Valiant.
Document 13: Susan Pevensie: Susan Pevensie is a fictional character in C. S. Lewis's "The Chronicles of Narnia" series. Susan is the elder sister and the second eldest Pevensie child. She appears in three of the seven books—as a child in "The Lion, the Witch and the Wardrobe" and "Prince Caspian", and as an adult in "The Horse and His Boy". She is also mentioned in "The Voyage of the Dawn Treader" and "The Last Battle". During her reign at the Narnian capital of Cair Paravel, she is known as Queen Susan the Gentle or Queen Susan of the Horn. She was the only Pevensie that survived the train wreck (because she was not on the train or at the station) on Earth which sent the others to Narnia after "The Last Battle".
Document 14: The Personal Heresy: The Personal Heresy is a series of articles, three each by C.S. Lewis and E. M. W. (Eustace Mandeville Wetenhall) Tillyard, first published on 27 April 1939 by Oxford University Press and later reprinted, also by Oxford University Press, in 1965. The book has been reprinted in 2008 by Concordia University Press with an Introduction by Lewis scholar Bruce L. Edwards and a new Preface by the editor, Joel D. Heck. The central issue of the essays is whether a piece of imaginative writing, particularly poetry, is primarily a reflection of the author's personality (Tillyard's position) or is about something external to the author (Lewis's position). The two positions may be summarized briefly as the subjective position (Tillyard) and the objective position (Lewis). In general, Lewis attempts to keep poetry within the reach of the common person, while Tillyard thinks of the poet as a person who is "a cut above the common person."
Document 15: Lucy Pevensie: Lucy Pevensie is a fictional character in C. S. Lewis's "The Chronicles of Narnia" series. She is the youngest of the four Pevensie children, and the first to find the Wardrobe entrance to Narnia in "The Lion, the Witch and the Wardrobe". Of all the Pevensie children, Lucy is the closest to Aslan. Also, of all the humans who have visited Narnia, Lucy is perhaps the one that believes in Narnia the most. She is ultimately crowned Queen Lucy the Valiant, co-ruler of Narnia along with her two brothers and her sister. Lucy is the central character of the four siblings in the novels. Lucy is a principal character in three of the seven books ("The Lion, the Witch and the Wardrobe", "Prince Caspian", and "The Voyage of the Dawn Treader"), and a minor character in two others ("The Horse and His Boy" and "The Last Battle").
ground_truth: Clive Staples Lewis