This is a tale of technological and social change, largely due to the introduction of horses on the Great Plains.
Comanches were at a social disadvantage before horses due to their nomadic, non-agricultural lifestyle. When horses came, this became a benefit because they were able to adapt, in an almost Christensen-like fashion.
One downside of their horse centric culture, combined with egalitarianism (women rode as well as men), was that it led to reduced natality rates (early term miscarriages). This in turn increased their propensity to kidnap young Anglo girls, the most famous of whom was Cynthia Ann Parker.
The book covers the introduction of a wide range of other inventions (Colt revolvers, Spencer and Henry rifles), as well as political shifts (Texas was under five of its six flags during this period). In doing so, the author deftly handles these broad structural changes while giving detailed accounts of battles and evolution of tactics (such as Rangers learning to fight in the Comanche style).
This is essential reading for an understanding of the Great Plains.