Visitors to Texas and New Mexico have marveled for centuries at the immensity of the Llano Estacado and the surprising contrast as, at the edges of the great mesa, the flat ground gives way suddenly to such spectacular formations as the Palo Duro and Caprock Canyons. In the introduction to Amarillo Flights, artist and naturalist Walt Davis chronicle the history of this region--what Paul Chaplo calls the "Llano Country"--and of those artists,...