For journals/documentation I would recommend Warren Angus Ferris' Life in the Rocky Mountains. It provides more details and insight into the daily life of mountain men than most journals I've read. The American Mountain Men website is a great resource for journals and documentation from the fur trade era. I prefer a real book but have shelled out thousands for my "fur trade library" over the years. There are many books (including Ferris') available for free on their site. Here's a link. http://www.mtmen.org/mtman/mmarch.html If you're interested in historical fiction, there are three series I have really enjoyed. My absolute, hands down favorite is Terry C. Johnston's (don't confuse him with William Johnstone's horrible "mountain man" books) Carry the Wind 9 book series. Next up is a tie between Edward Louis Henry's "Temple Buck Quartet" and Win Blevins So Wild a Dream series. My biggest gripe with Henry's series is how the main character (Temple Buck) constantly, almost unbelievably, stumbles into money and women. The only gripe I have with the Blevin's series is the amount of time spent in and around California. When I read about the "fur trade era" I want to read about the mountain west. All of three of these series are very well researched by authors who know the history of the fur trade era and are worth reading. I haven't been around in a while so I apologize for the late reply.