On the Colorado Trail — Sara Barnard

The pale face soldiers have torn Wind That Knocks Down Lodges and Cactus Flower's world apart. After finding themselves at the mercy of the Army, far from Apache Territory and well on the trail to Colorado, Knocks Down's choices are dwindling rapidly. After a failed attempt at escape that leaves Cactus Flower injured and both of them in danger, can Knocks Down bring himself to trust the soldier, Pale Face Joe? His life depends on it, and his little sister's does, as well!