Ursula K Le Guin

When young Tenar is chosen as high priestess to the ancient and nameless Powers of the Earth, everything is taken away from her-home, family, possessions, even her name. She is now known only as Arha, the Eaten One, guardian of the labyrinthine Tombs of Atuan, shrouded in darkness. When a young wizard, Ged Sparrowhawk, comes to steal the Tombs' greatest hidden treasure, the Ring of Erreth-Akbe, Tenar's rightful duty is to protect the Tombs. But Ged...