C.F. McGlashan was the newspaper publisher of the local paper in Truckee, California, the closest town to the Donner Pass. McGlashan interviewed the survivors of the Donner Party, gathered artifacts and amassed an enormous amount of secondary information. Over an 18 month period, McGlashan published serialized articles in his paper and turned his articles into a book. History of the Donner Party is considered the definitive account of one of the most notorious treks in American history.

The tragedy of the Donner party constitutes one of the most amazing stories of the American West. In 1846, 87 people, men, women, and children, set out for California, persuaded to attempt a new overland route. After struggling across the desert, losing many oxen, and nearly dying of thirst, they reached the very summit of the Sierras, only to be trapped by blinding snow and bitter storms. Many perished; some survived by resorting to cannibalism; all were subjected to unbearable suffering.

In late October 1846, the last wagon train of that year's westward migration stopped overnight before resuming its arduous climb over the Sierra Nevada Mountains, unaware that a fearsome storm was gathering force. After months of grueling travel, the 81 men, women and children would be trapped for a brutal winter with little food and only primitive shelter. The conclusion is known: by spring of the next year, the Donner Party was synonymous with the most harrowing extremes of human survival.

In April of 1846, 21-year-old Sarah Graves, intent on a better future, set out west from Illinois with her new husband, her parents, and eight siblings. Seven months later, after joining a party of pioneers led by George Donner, they reached the Sierra Nevada Mountains as the first heavy snows of the season closed the pass ahead of them. In early December, starving and desperate, Sarah and 14 others set out for California on snowshoes and over the next 32 days endured almost unfathomable hardships and horrors.

Cutting through 160 years of mythmaking, best-selling historian Michael Wallis presents the ultimate cautionary tale of America's westward expansion.