Forty Rod, I'd love to read your work, and will when I find it in a format suitable to my e-reader.
As to old west authors/books, I'll offer 3:
Charles Portis, "True Grit." Supposedly, Portis was an absolute master of the language and culture of the times. Fiction, but with a very historical underlay. The best book I've read for a long time. They call it an epic for a reason. (I think the Cohen brothers movie captured it well. If you liked the movie, the book is the same on steriods.)
Owen Wister, "The Virginian, a Horseman of the Plains." Only recently turned on to this by a comment in a video on this forum from Bottom Dealin' Mike. There are moments it's merely a good novel. There are moments I think the language waxes to greatness. In my opinion, it never sinks to simply average. I trust its spirit is accurate to the old west.
Zane Grey, "The Last of the Plainsmen." In the first few pages, I thought the writing a little hokey, and maybe bad. After studying anthropology in school, I thought the initial Native American dialogue at the beginning of the book an atrocious characature. ("How," "Ugh," bad broken English, how terrible!) But after getting into the book further, and asking myself was there a real "Buffalo Jones" and doing some research, I was surprised to find "Last of the Plainsmen" is cataloged as non-fiction. In 1907, Grey contracted with the real Buffalo Jones to go cougar hunting with a rope, not a gun. Grey actually took careful notes on the conversations and antics of the plainsmen who were with him. The tarantula story and the bit about the snake practical joke are probably real. So is the story of Jones' travels in the north. The book is a history of Grey's real expedition as well as a historical novel. I'm a back-country guy myself, and the realization of its historicity transformed my respect for the account. Now I love the book. (But I'd NEVER choose to go rope a cougar...)
You probably knew about these ones already.