Him Standing by Richard Wagamese

When Lucas Smoke learns the Ojibway art of carving from his grandfather, he proves to be a natural. He can literally make people come to life in wood. Then Lucas's growing reputation attracts a mysterious stranger, who offers him a large advance to carve a spirit mask.

This mask is to represent the master, but Lucas must find its face in his dreams. As his dreams become more and more disturbing, he feels himself changing. And the mask takes control of his life. Then a chance encounter with an old woman introduces him to the identity of the master. He is an ancient sorcerer named Him Standing, a powerful and dark wizard. The more Lucas works on the mask, the closer Him Standing comes to emerging from the dream world to walk the earth again. What follows is a race against time and the forces of evil in this supernatural thriller.