Randolph Marcy wrote this guide for fellow travelers wanting to brave the wilderness of North America, at a time when the western reaches of the continent were barely settled.

A captain in the U.S. military, Marcy wrote this guide partly to allay the many myths and fears of the Western frontier, and partly to offer guidance to the dangers which were actually manifest. The information within takes readers across two popular trails - northerly, ending in Oregon, and southerly, ending in Santa Fe.

Written in 1859, this book is both a guidebook and an authentic history of the Wild West era. Various anecdotes are interspersed through the text - Marcy is careful to differentiate between friendly Indian tribes such as the Delawares and Shawnees, whom he admires. The Plains Indians however are considered to have hostile tendencies; Marcy instructs on how to sign, and gives a detailed account of how to safely sleep with a gun cocked and loaded.