Craig Childs bears witness to rock art of the Colorado Plateau'bighorn sheep pecked behind boulders, tiny spirals in stone, human figures with upraised arms shifting with the desert light, each one a portal to the open mouth of time. With a spirit of generosity, humility, and love of the arid, intricate landscapes of the desert Southwest, Childs sets these ancient communications in context, inviting readers to look and listen deeply.