The Long Trains Roll — Stephen W. Meader

Not only an adventure story packed with thrills, this is also a book about railroads that will appeal to all railroad fans.Through Calico Gap, one of the passes to the West through the Appalachian wall, runs a four-track rail artery, an important military objective for enemy sabotage. Randy MacDougal, youngest son in a family of railroaders, stumbled on the clues leading to such an attempt, followed them through with the aid of the railroad detective and the FBI, and averted a catastrophe endangering war transportation.