This one is not a railroading nonfiction, in fact it is a fictional story written for younger boys, but if you or anyone in your family might enjoy a steam era trains story, I thought I would at least let you all know. It is called "Through by Daylight: Or, the Young Engineer of the Lake Shore Railroad", by Oliver Optic
https://www.gutenberg.org/ebooks/73134
https://www.gutenberg.org/ebooks/73134