This is a tale of one man's road toward fulfillment that plays out in stages of encounters and abandonment instead of one glorious "last stand" expected in a Western romance. Williamson's story weaves the best elements of several genres and with masterful dialogue he illustrates the landscape of a heart cultivated and ravaged by the challenges that emerge in his path. The majestic setting of the rugged west and its horses is not the main aesthetical context, however. "For [us] women were the whole world and the promise of it, men being hardly more than rivals in love to be challenged and defeated." The Last Westerner is an ode to human happiness embodied in women, and "the kind that comes from a sense of the wholeness, the absolute rightness, of it all." Williamson seems to mean that without women (and horses) no such answers will ever be found. "People without hope don't write books, they say. Neither do men who love women--one woman in particular--lack hope."

Jeb Stuart Ryder, at 51 a retired range detective from Wyoming, meets Jody James, a handsome widowed cowgirl at a horse show in Moab, Utah, where she is exhibiting her prize horse. They begin an idyllic life together until this horse is stolen, and he pledges to pursue the thieves and bring him back to her. Along the way he meets a 16-year-old Navajo boy, John-Wayne Bilagody, who joins the search but with the intention of offering this horse to his own woman. Jeb takes it upon himself to instruct John-Wayne in the proper chivalric attitude a man owes a woman. When they come to the camp of brigada who now possesses the horse, Jeb's world strains to accommodate the existence of Carmen, the beautiful and aristocratic woman who is preparing to lead those men back into Mexico. She has his horse, but his pledge to return it to Jody holds fast. His promise had been a sign of hope, but Jeb at long last arrives at a pass that he knows is the real path to his sunset.