The gnawer of rocks

"While everyone is busy preparing for the coming winter, two girls wander away from their camp, following a path of strange, beautiful stones. Each stone is lovelier than the last, and the trail leads them farther and farther away from camp. But what starts out as a peaceful afternoon on the land quickly turns dangerous when the girls find themselves trapped in the cave of Mangittatuarjuk--the Gnawer of Rocks!"--Provided by publisher.