A Witch World novel. The offspring of Simon Tregarth and the Estcarp witch Jaelithe, half earthling, half witch-brood, realized that they alone could perceive the four directions--for everyone else, there was no East! It was a blank in the mind, a blank in legend and history. And when new menaces threatened, the Tregarths realized that in that mental barrier there lay the key to all their world . . . somewhere to the unknown east must lie the sorcery that had secretly molded their destinies.
Classic Andre Norton--Good light adventure story.