The Dreamstone by C. J. Cherryh

Set in a richly woven fantasy world, the story follows the journey of a young human named Eveshka, who becomes entwined in the ancient and mystical struggles of the Sidhe, a race of powerful and enigmatic beings. As she navigates the treacherous landscape of alliances and betrayals, Eveshka discovers her own latent powers and the pivotal role she must play in the fate of both humans and Sidhe. The narrative explores themes of identity, power, and the delicate balance between two worlds on the brink of conflict, all while weaving a tale of magic, destiny, and the enduring quest for harmony.