Hat tip to Kim Guinta of Routledge Publishers who responded to my question regarding the book's initial print run. She writes, "the book is definitely geared toward library collections and will have a shorter first printing than many of our course-adoption titles, but anyone who is interested in the Civil War and in Carman will want to have a copy as reference. Right now, we're anticipating a first printing between 500 copies and 1,000, but that hasn't been set at the moment, because the book is still in production, and depending on advance orders and that sort of thing, the final first printing number could increase or decrease. As I'm sure you're aware, with today's digital printing, it is easier to reprint than ever, so the first printing may be shorter than it would otherwise be, because of quick turn around with the reprints."
Seasoned collectors know that digital and print-on-demand technology can be a sore spot for it makes it much harder to track print runs, number of printings, etc.