James Jewell is one of the few professional historians specializing in the Civil War in the Far West. I conversed with him years ago when he was trying to put together a volume of essays on the topic. Unfortunately, that particular project didn't work out, but he does have two new books in the works. Jewell's doctoral dissertation ("Left Arm of the Republic," 2006) was on the Department of the Pacific, and he is now parlaying that expertise into Little Glory to be Won: The Department of the Pacific and the Civil War in the Far West, which will be published by University of Oklahoma Press.
Jewell is also finishing up On Duty in the Pacific Northwest during the Civil War: Correspondence and Reminiscences of the First Oregon Cavalry Regiment for University of Tennessee Press, presumably for their Voices of the Civil War series. The best single source for the two Oregon volunteer regiments is still a 1960 master's thesis so this book will be a much welcomed.
Neither volume will likely make it to us this year, but both are something to look forward to by those of us interested in this largely untapped part of the Civil War experience.