Sheldon Russell, a college professor in Oklahoma, has written three mystery novels over the past 3 years about a one-legged railroad detective in postwar (1940s) America. His first was Yard Dog, the second was Insane Train, and the most recent title escapes me. They are well written and detail- relevant with respect to operation description. Google or Wikipedia his name- he has his own website. I have e- mailed him before and he is a great guy!