Given the question: The Children of Llyr is a fantasy novel by Evangeline Walton the second in a series of four based on the Welsh Mabinogion. It was first published in paperback by Ballantine Books as the thirty-third volume of the celebrated Ballantine Adult Fantasy series in August 1971. It has been reprinted a number of times since and gathered together with Walton's other Mabinogion novels by Overlook Press as the omnibus The Mabinogion Tetralogy in 2002. Given a list of categories: company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, what category does the paragraph belong to?
The answer is:
Written Work