Book - Children of the Longhouse by Joseph Bruchac
When Ohkwa'ri overhears a group of older boys planning a raid on a neighboring village, he immediately tells his Mohawk elders. He has done the right thing—but he has also made enemies. Grabber and his friends will do anything they can to hurt him, especially during the village-wide game of Tekwaarathon (lacrosse). Ohkwa'ri believes in the path of peace, but can peaceful ways work against Grabber's wrath?
Here's another great book by Joseph Bruchac.