@Gomez: "Walden" is a good one 

I'd like to suggest one I mentioned somewhere else around here:

"The Cowboy Way - Seasons of a Montana Ranch" by David McCumber, in which the author, a journalist, spends a year working on the Galt ranch and writes about his time there.

Maybe interesting for ranchers for a different point of view of somebody who did the work for the first time in his life. Funny, too. And honest.