Keeper of the Isis Light, Monica Hughes, 1984

For longer than she can remember, Olwen has lived on the hot and arid Planet Isis, as keeper of its interplanetary lighthouse and observation station. With only her Guardian for company, she has never seen herself in a mirror, or through another’s eyes, until a spaceship of colonists from overcrowded Earth arrives. A futuristic science fiction approach to coming-of-age literature that explores tolerance and self-acceptance, albeit in a dated and two-dimensional manner.