They say you can’t teach an old dog new tricks. But old cowboys? That’s a different story—especially when those cowboys are trail-hardened cattlemen like Casey Tubbs and Levi Doolin. When these longtime buddies learn that their bosses are getting out of the beef business, they figure it’s probably time to retire anyway. Nothing left to do now but deliver the last two-thousand cows to Albilene and collect their pay. There’s just one problem. Their bosses’ lawyer is skipping town with all the workers’ cash—which means Tubbs and Doolin have one last job to do...

Sheriff Joe Brooks was talking to a young prisoner who gave him some incredibly bad news. Three notorious gangs of outlaws had merged into one large band big enough to take over entire towns in his sparsely populated county. It was when they began to terrorize his county that he had to act, and he’d have to take them on alone.

Flint Moran was fourteen years old when the Civil War ended. He was fifteen when his family bought a plot of land near Tinhorn, Texas. He was barely nineteen when he caught a pair of rustlers stealing cattle—and singlehandedly brought them to justice. How did a teenaged boy track down and capture two hardcase thieves without any help? That's what Tinhorn sheriff Buck Jackson wants to know. He can't help but be impressed by Flint's sharp eye and natural talent with a Henry rifle. So he offers to deputize the boy—tin badge, Colt Frontier Six-Shooter, and all—and Flint happily accepts.

It’s 1852. The wounds of the Mexican War are healing. Regis Royle, co-owner of a steamship fleet, has made it out alive, relatively unscarred and with enough profit and foolhardy ambition to envision a new life in south Texas. With the help of his crack-shot kid brother Shepley, his glad-handing riverboat partner Cormac Delany, and his old friend, raw-edged former Texas Ranger Jarvis “Bone” McGraw, Regis is laying claim to the prime jewel in a magnificent rolling prairie: the Santa Calina range teeming with wild mustangs, cattle, and eighteen-thousand acres of lush promise.

No one had seen the innocuous rock on the long climb to the pass on the Oregon Trail, and when the last covered wagon in the long line rolled onto the lump of granite, it shouldn’t have made much of a difference, but it caused almost instant tragedy. Just seconds later, the wagon plunged over the edge of the narrow trail, then began its deadly, tumbling roll into the abyss, spewing its contents as it fell to its destruction. Her precious children had been trapped inside, and Rebecca could only watch in horror. Her children had been her life, and now she had nothing.