>>My main areas of interest have been military history from 1812 to the present time, biographies and exploration expeditions (such as Earnest Shackleton, etc.) but I do read and collect anything and everything fiction, non-fiction, poetry, you name it. Thank you for all the good input.
Well, thanks right back at you Frank for your input.
I quit counting my books around 10 years ago (I had around 3,000 then) - the time it took to count them was time I could spend reading

Most of what I have is history, political-science, anthropology, and ethnography. I've only a few novels on the shelves that I've hung on to for "sentimental" reasons.
The histories pretty much mirror my academic studies (the history of American foreign policy and European diplomatic history and work-related lines of study (public policy and the environment, natural resources management history, and cultural resources management). It's only been in the past dozen years or so that I returned to Montana history and the history of the American West - I had read a lot in those areas when I was a kid, and I guess I felt like it was time to return to my roots

But I'm still pretty eclectic in the history that I read.
In keeping (more or less) with the topic of this thread, right now (among other things) I'm reading:
Ewers, John Canfield. THE BLACKFEET: RAIDERS ON THE NORTHWESTERN PLAINS (1958; reprint: University of Oklahoma Press, 1967).
It's a good read on the Blackfoot Nation, it's old, but some of those older works on Native Americans are still valuable sources. Another of the older works that worth a read is:
Grinnell, George Bird. THE CHEYENNE INDIANS, THEIR HISTORY AND WAYS OF LIFE, 2 vols (1923; reprint: University of Nebraska Press 1972).