The Keeper of the Isis Light

Olwen Pendennis is the Keeper of the Isis Light. She and her companion, Guardian, have lived alone on the remote planet Isis since the death of her parents. Now colonists from overcrowded, polluted Earth have landed and are settling in the valleys. Olwen fears these new inhabitants may ruin her world forever, and it seems she may be right.

Monica Hughes's brilliant Isis trilogy is a classic of science fiction, creating a world that is enthralling, dangerous, and irresistible.