Backwards Moon — Mary Losure

In this magical story, two fledgling witches must save their village from the threat of encroaching human civilization.

Bracken and Nettle are the last young witches in the valley. Their mothers disappeared years ago in search of the secret Door to a world without humans, leaving the girls in the care of thirteen ancient witches. When the magical veil that protects their valley from humans is broached and the Wellspring Water needed to repair it is polluted, it is up to the girls to save the coven. The Door to the other world lies in the city, where witches suffer The Fading. Only young witches can resist The Fading long enough to stand a chance of finding the Door. Seeking stones, a wishing necklace, a wily raccoon, human Witchfriends, and their lost mothers help Bracken and Nettle on their quest. But it is thanks to their own courage, fledgling magic, and loving hearts that all ends well in this utterly enchanting novel.