"Mackenzie saw something move behind her sister in the shadow of the stones. It was an arm, long and thin, reaching out from the dark space beneath the arch. Mackenzie froze as a hand began to move over the ground at the base of the stones. Three long bony fingers and a thumb, patting the ground, feeling for something." Something sinister happened to Mackenzie's twin sister Breanne the last time the two girls were in Ireland. Now they're back and the winter solstice is approaching. Breanne scoffs at their elderly relatives' tales of fair folk and banshees and the thin barrier between two worlds, but Mackenzie remembers what happened to Breanne five years before--at the summer solstice. Mackenzie is convinced the Otherworld is real, but is it a place of enchantment or enslavement for humans? Rachel Dunstan Muller is the author of two previous children's novels: "When the Curtain Rises" and "Ten Thumb Sam." The Solstice Cup was conceived while Rachel was living on the northeastern shore of County Antrim, Northern Ireland. She currently lives on the edge of a small Vancouver Island community with her husband and five children.