Little did Louis L'Amour realize back in 1960 when he publishedThe Daybreakers,a novel about two brothers who came west after the Civil War, that he had begun creating what would become perhaps North America's most widely followed literary family: the Sacketts. The stories of ten generations of Sackett man and women as they forged westward from tyranny-wracked seventeenth-century England across the American continent have captivated readers for three...