The Grey King (The Dark is Rising Sequence)

There is a Welsh legend about a harp of gold, hidden within a certain hill, that will be found by a boy and a white dog with silver eyes -- a dog that can see the wind. Will Stanton knew nothing of this when he came to Wales to recover from a severe illness. But when he met Bran, a strange boy who owned a white dog, he began to remember.

Psychology Today

Susan Cooper is one of the few contemporary writers who has the vivid imagination, the narrative powers, and the moral vision that permit her to create the kind of sweeping conflict between good and evil that lies at the heart of all great fantasy. Tolkien had it. So did C.S. Lewis. And Cooper writes in the same tradition.