Storm Runner - Serie "Wolfwalker", Vol. 3, di Tara K. Harper

As a wolfwalker, Dion made an ideal border scout. She could experience the woods and mountains through the senses of her companion, the wolf Gray Hishn; even the wild wolves fed her their impressions. And that was how she knew that in the beleaguered lands across the border, something unspeakable was happening. The wolves were fleeing in droves. And those that remained behind had cut Dion off from their packsong. Nothing but their terrible grief and despair leaked through.
Dion knew that time was running out for the people on the other side of the border -- and for wolves everywhere. Her only hope lay with an ancient rite that had remained untested for generations -- the Calling of the wolves!