Off the Main Lines will take you on a visually stunning journey as author Donovan L. Hofsommer records the end of branch line passenger service, the demise of electric railroads, the transition from steam to diesel power, as well as the end of common carrier freight service on the Colorado narrow gauge.

Hofsommer is a railroad historian and photographer who will carry you along railways in Iowa, Minnesota, Missouri, Colorado, Oklahoma, Texas, Montana, and South Dakota to see the changes that occurred on these lines from the 1940s to the 1990s.