The Snow Queen

Joan D. Vinge · first published 1980 · ISBN 9780765381774

On Tiamat, an ocean world locked in a perpetual cycle between two celestial seasons, a young girl named Moon must survive as a sibyl, bearing an alien intelligence's memories and wisdom in her mind. As the planet enters its twilight season, she becomes entangled in the political schemes of the Snow Queen, an immortal ruler who uses time-dilating technology to preserve her power across the ages. Her journey becomes one of survival, belonging, and discovering what it means to stand between worlds.