Child of light / Terry Brooks.

At 19, Auris Afton Grieg has led an unusual life. Since the age of 15, she has been trapped in a sinister prison. Why? She does not know. She has no memories of her past beyond the vaguest of impressions. All she knows is that she is about to age out of the children’s prison, and rumours say that the adult version is far, far worse. So she and some friends stage a desperate escape into the surrounding wastelands. And it is here that Auris’s journey of discovery begins, for she is rescued by an unusual stranger who claims to be Fae – a member of a magical race that Auris had thought to be no more than legend. Odder still, he seems to think that she is one as well, although the two look nothing alike. But strangest of all, when he brings her to his wondrous homeland, she begins to suspect that he is right. Yet how could a woman who looks entirely human be a magical being herself?