The Grey King

Will is the last-born of the Old Ones, immortals dedicated to saving the world from the forces of evil. And now it is Will's task to wake, with the golden harp, the six who must be roused from their long slumber in the Welsh hills to prepare for the last battle between the Dark and the Light.
A strange boy and dog remind Will Stanton that he is an immortal, whose quest is to find the golden harp which will rouse others from a long slumber in the Welsh hills so they may prepare for the ultimate battle of Light versus Dark.