Albrecht, Harry P. World Famous Horseshoe Curve: Altoona Pennsylvania Railroad. Clifton Heights, PA: Harry P. Albrecht, 1973.

For further background information on the Horseshoe Curve, this pamphlet is recommended. Its availability may be limited however.

Cupper, Dan. Horseshoe Heritage: The Story of a Great Railroad. Halifax, PA: Withers Publishing, 1999.

In addition to the Nazi plot for destroying the curve, this 56-page book covers many other fascinating aspects of its history. Some include: construction/growth, unfulfilled plans to electrify it, runaways, wrecks, close-calls, famous passengers, and the recent renovation of the visitors" center.

Potter, Janet Greenstein. Great American Railroad Stations. New York: John Wiley & Sons, Inc., 1998.

This book tells the story of approximately 700 American railroad stations and includes 500 archival photographs and sketch drawings.

Treese, Lorett. Railroads of Pennsylvania. Mechanicsburg, Pa.: Stackpole Books, 2002.

A wide-ranging look at history, culture, tourist lines, and rails-to-trails efforts.

Ward, James A. J. Edgar Thomson, Master of the Pennsylvania. Westport, CT: Greenwood Press, 1980.

This book details the multi-faceted business career of railroad entrepreneur J. Edgar Thomson. It describes his impact on the Pennsylvania railroad system, his influence in other rail networks, as well as other economic enterprises.