Sorry about the itsy bitsy picture, it's the only one I could find.
I love Elisabeth Beresford's Wombles series and was pleased to discover one of her magic books in my own library system! There's plenty of magic in the background of the story, although the focus is the main character's gradual acceptance of his role as rescuer and his journey through the history of the island via various magical means. Every section and character of the story hooks neatly into the appropriate spot and finishing it was as satisfying as completing a good jigsaw puzzle. Fans of E. Nesbit, Diana Wynne Jones, and other tales of magic with a classical feel will enjoy this story.
ISBN: 978-0525666820; Published 1980 by Dutton; Borrowed from the library; Added to my personal wishlist