Streets of Laredo: Lonesome Dove 4

Captain Woodrow Call, Gus McCrae's old partner, once a youthful Texas Ranger, is now a bounty hunter hired to track down a brutal young Mexican bandit. Riding with Call are an Eastern city slicker, a witless deputy, and one of the last members of the Hat Creek outfit, Pea Eye Parker, now married to Lorena - once Gus's sweetheart.
Their long, perilous chase leads them across the last wild stretches of the West into a hellhole known as Crow Town and, finally, deep into the vast, relentless plains of the Texas frontier. The final novel in the Lonesome Dove quartet, Streets of Laredo is an exhilarating, elegiac and achingly poignant tale of heroism and friendship.