Bell Wiley is one of the foundational scholarly historians a Civil War reenactor should read. He is top shelf. I had the honor of meeting him 30 years ago when I was a student at Gettysburg and he was there for a lecture. Look at Wiley's bibliography. That will give you more ideas where to go. I would also recommend "Co Atch" by Sam Watkins. He has an irrepressible sense of humor.
Pine River Boys, Co I, 7th Wisconsin
"We're... Christians, what read the Bible and foller what it says about lovin' your enemies and carin' for them what despitefully use you -- that is, after you've downed 'em good and hard."
-Si Klegg and His Pard Shorty