In all the sagas of human migration, few can top the drama of the journey by midwestern farmers to Oregon and California in the years 1840-49. Seeking the promised land, these travelers trekked two thousand miles by covered wagon from Missouri to their destinations on the Pacific coast. Although they used mountain men as guides, they went almost literally into the unknown, braving dangers from hunger, thirst, disease, drowning, and Native Americans. The early migrants got through only after herculean efforts, but later in the decade complacency set in, and the result was disastrous, especially in the case of the Donner party, marooned in the snow and reduced to cannibalism. Using original diaries and memoirs, Frank McLynn underscores the incredible heroism and dangerous folly on the overland trails.