Greenwitch (The Dark is Rising, Book 3)

This may be a book that delves into the world of Arthurian legend, but it is handled pragmatically, with all the charm Susan Cooper can usually muster. Here, Simon, Jane, and Barney are lead to the strange world of British folklore and peasantry and the odd traditions that they have. But there is truth and magic behind these ceremonies, and it creates a delightful and spooky tale.