Flipping by a pledge driven re-airing of Ken Burns' The Civil War, I was reminded of all the diary readings from Elisha Hunt Rhodes. He was a Union soldier, and I seem to remember him surviving all the way from the earliest engagements to the end of the war. I always wanted to read his story.
His letters and diaries were collected in All for the Union, which is still available in paperback and has a Kindle edition, too.
Here is the short Wikipedia page about him. Elisha Hunt Rhodes.
Bonus; he's buried at Swan Point cemetery - the same cemetery where H. P. Lovecraft is buried.