Andre Norton 
Wind in the Stone 

An orphan girl battles an evil mage in this ‘;stunningly vivid’ fantasy from the New York Timesbestselling author of The Scent of Magic (Starlog). A mage, seeking to enslave the Valley and destroy the Forest, has brutally sundered a family. A mother has fled into the woods with her infant girl-child, while the depraved sorcerer holds the babe’s twina boycaptive in a black tower. The mother dies but the girl survives. Adopted by the strange denizens of the Forestsafe from the mage’s malevolent influenceshe grows to young womanhood, cultivating a cherished skill that has been denied the others of her kind: the ability to truly hear the sounds of her world. But her future will be fraught with trial and terror, for only she can smash the chains that shackle the Balley and its inhabitants. It is her destiny to confront sorcerer and demon minions, and to oppose the one she must conquer and free: the magician’s protege and her most powerful adversary. Her bane and blood. Her brother.