While I was reading this book in the Children's Department at the library (with tri-lingual translations -- Chinese, Spanish, and English) about a trickster type character who made the most of his time working on the Western railroads, becoming a courier and then a pie-maker, and finally disappearing back to China, a Chinese family walked by and I nearly wept. I had only been home from China for 3 days and I was homesick. So this book was great in that respect, a neatly told and lovingly illustrated tale of the weirdness that is American folklore. I have a feeling it's a bit hard to find, but if you do find it, pick it up! It's cool.
The book may be based on actual historical figures but leaves out important historical context: the prohibition against women immigrating from China (making it unlikely his buddy could send for his wife and children) and the indentured servitude conditions that make me doubt railroad workers were free to go at the end of the railroad construction.