Well, in all honesty, "A Wizard of Earthsea" is widely regarded as a solid piece of literature, magic or not. Then again, so are "Atlas Shrugged", "The Mists of Avalon", and "The Lion, the Witch, and the Wardrobe", each of which directly espouse their own philosophies, one of which is unapologetically Christian. And they're probably as likely to be read in school as "A Wizard of Earthsea" (which, oddly, I did read for high school).