I've long had an interest in the ACW. It first got me into wargames. Gettysburg has interested me for 40 + years and I've bought a considerable number of books on it. (too many says my wife).
I have to mention a New book by Mark Adkin from the military book club that I think is superb. very comprehensive. Excellently researched and illustrated.
If you are interested in the battle it is definitely a must. I thought I had every book I needed until I got this. Highly recommended.
ISBN 978 1 84513 342 2
Have a good new year!!