The Twelfth Stone by Jana Laiz

The faerie world is fading. Human greed is giving rise to the evilest of faeries. Only Rionnag’s marriage will prevent earth’s doom. But she will have none of it. The Twelfth Stone is a Celtic American fantasy, adventure, romance and cautionary faerie tale for young adults & adults. Set in the faerie worlds of Scotland and Ireland and the human hills of Western Massachusetts, two worlds collide and in doing so, make each other aware of the need to save both sides from ecological destruction. Led by Fiona and Rionnag, the cast of characters runs the gamut from evil faeries to captured mortals, from destructive developers to secret lovers who meet only when the borders between the worlds open.