Everything you need to understand or teach Fire and Hemlock by Diana Wynne Jones.
Fire and Hemlock retells the story of two Scottish ballads, "Thomas the Rhymer" and "Tarn Lin." Both focus on a young, handsome man fancied by a powerful queen of a magical elf kingdom. The queen takes the man to her kingdom for a number of years, but he later discovers that the price of his journey is dear. Indeed, his life may be forfeit. The queen of Elfland averts Thomas the Rhymer's death...