This book investigates the history and operational details of the Southern Pacific Railroad's narrow-gauge lines in the American West. Authored by George W. Turner, a recognized historian of Western railroads, the work draws upon extensive archival research, company records, and photographic evidence to detail the challenges and triumphs of these unique railway operations. The book presents a comprehensive account of the development, service, and eventual abandonment of these narrow-gauge routes, highlighting their significance in regional development and transportation history.

This work is recognized as a definitive study on the Southern Pacific's narrow-gauge operations. Turner's meticulous research and detailed presentation have established it as a key reference for railroad historians and enthusiasts. The book is valued for its comprehensive scope and the depth of its historical analysis, providing an authoritative account of a significant, yet often overlooked, segment of American railroad history.