Book excerpt: (Volume 1 of 2) Killsback, a citizen of the Northern Cheyenne Nation, reconstructs and rekindles an ancient Cheyenne world--ways of living and thinking that became casualties of colonization and forced assimilation. Spanning more than a millennium of antiquity and recovering stories and ideas interpreted from a Cheyenne worldview, the works' joint purpose is rooted as much in a decolonization roadmap as it is in preservation of culture and identity for the next generations of Cheyenne people. Dividing the story of the Cheyenne Nation into pre- and post-contact, A Sacred People and A Sovereign People lay out indigenously conceived possibilities for employing traditional worldviews to replace unhealthy and dysfunctional ones bred of territorial, cultural, and psychological colonization.