What is the theme in The Tracker by Tom Brown?

Tracking is the main theme. From the beginning, Brown is clear that Grandfather Stalking Wolf wants the boys to know more than simply being able to identify tracks and animal habits. Stalking Wolf often smiles wryly, though saying little, when the boys look only at tracks. This quiet smiling reveals Grandfather Stalking Wolf's own spiritual strength. He does not talk on and on like other people. Saying little shows the boys the inner strength it takes to be a true leader.