Yessir its a pretty good collection of essays most by Parker Hills. It has some maps and illustrations. Probably one of the main takeaways of the book is what a dramatic turn of events for Grant having everything to go smoothly until the assaults and the lack of much planning going into them.
Charles Grear is a frequent speaker. I have heard him do presentations at the Houston Civil War Round Table and Annual Jefferson Civil War Symposium. They did another book on Vicksburg that I read probably 2.5 years ago but I can't recall the name of it.