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The site in Atlanta was apparently Kennesaw Mountain, I presume.  There were other battles here that are now housed over, some historical markers are dotted about including one very near me.  Things in person have a different perspective for me versus studying even good maps.

Shoot me a PM if it's in book form and could get thru the local library from search Ohio

It looks like the Columbus Library has one but it is "in use":

https://cml.bibliocommons.com/v2/record/S105C981814

Here is one for sale:

https://www.garrisonhousebooks.com/product/18804/Joshua-DeWees-His-Civil-War-Diary-Army-of-the-Cumberland-DeWees--Joseph-editor

I have his service record of his hanging in my office (will try to attach a picture).  

More on my 2-great grandfather Joshua DeWees:
Joshua was born in Ohio in 1843.  His father William died when he was a child.  He was raised Quaker.  The Quakers opposed slavery but they were also pacifists.  When the Civil War started he felt that sitting around a Meeting House (Quaker version of church) talking about ending slavery was somewhat less effective than joining the Union Army and going down South to free the slaves so he joined up.  

The Quaker Church excommunicated him for joining the Army.  That isn't really true, their term isn't "excommunicated", that is Catholic.  I actually don't know what their term is but Quakers are called "Friends" so I always say that they unfriended him, LoL.  

Joshua's brother Caleb was killed at Gettysburg.  I learned this from reading in Joshua's diary entry for July 5, 1863 that he "received a telegram that brother Caleb had been killed at Gettysburg".  My problem was that Joshua's language made that unclear.  I didn't know if he meant "Brother Caleb" as in "brother in the faith" like "Brother Nubbz" or if he meant his biological brother.  I spent an afternoon at the Historical Society in Columbus and discovered that a Caleb DeWees had served in the 73rd OVI and been killed at Gettysburg on July 3, 1863. 

There is a monument to the 73rd OVI just South of Gettysburg off Taneytown Rd inside the Gettysburg National Cemetery where my 3-great Uncle Caleb is buried.  The 73rd OVI defended a section of the Union Line near Culps Hill just South of the small village of Gettysburg and not far from the home of Jenni Wade (the only civilian casualty at Gettysburg).  Jennie was killed while baking bread in her kitchen for the Union Soldiers and, for all I know, Caleb may have met her and/or eaten some of her bread because he was in that immediate vicinity.  

Joshua survived the war and had a son in the 1870's who was my great-grandfather.  His daughter was my grandmother (1909-2012) and her daughter (1944-present) is my mom.  In my copy of the diary I have a picture of my grandmother sitting on Joshua's knee and in the picture my grandmother appears to be about 4-5 years old so the picture was probably taken in 1913-1914ish.  

I've been to every major Civil War battlefield except Shiloh.

This is really neat.  I will say, it is easier for you in Atlanta since obviously most of the battles were fought in the South.  

The next two I really want to get to are Antietam and Perryville.  

Antietam:
The bloodiest day in American History.  This battle is much less well known than Gettysburg mostly because it was a less comprehensive Union victory but it had a major impact on history.  For one thing, just like Gettysburg about a year later, this battle was forced by the Union as a check on a Confederate invasion of the North.  Secondly, Lincoln had already written the Emancipation Proclamation but he and his Cabinet felt that releasing it would reek of desperation unless it could be released after a Union victory.  Antietam was somewhat inconclusive but that was good enough for Lincoln and the Proclamation was released September 22, 1862 - five days after the Battle.  

Perryville:
This battle has much less of a macro-strategic interest but it has a personal connection.  My 2-Great Grandfather Joshua fought there.  It was his first action.  The 97th OVI had mustered in on September 1, 1862 at Zanesville and was then sent to a camp outside Columbus for training.  About a month later Confederate Troops under Braxton Bragg invaded Kentucky hoping to trigger a secessionist takeover of that state.  Union commanders in the area were short on troops so Joshua's and his unit's training was cut short and they were put on a train bound for Cincinnati.  Then crossed the Ohio River to Covington on a steamboat then marched South.   - side note - 

If you've ever driven South out of Cincy on I71/I75 you know how ENORMOUS that hill is.  Every time I do that it amazes me that these guys did it in wool uniforms while carrying weapons, ammunition, food, etc.  I think I'd have gotten about half way up that hill and said "Why don't we just let them secede".  

Anyway, October 8, 1862 at the Battle of Perryville is listed on Joshua's service record as the first of his "156 days under fire".  

From what I've heard the annual reenactment at Perryville is one of the most well attended in the whole country largely due to the fact that it is one of the few northern battlefields so it is closer to all of the northern reenactors.  Since Joshua was actually there and he was a common soldier I also think that I could get a run of his diary printed up and probably sell them pretty easily at the reenactment.  

For a second I thought you wrote Joshua Tree thinking so that's where they got the name for the album and not some desert plant.That would be something if he had really eaten at Jenny Wade's house.

He may have but obviously it would be impossible to find out since neither he nor Ms. Wade survived the Battle and even if they had they wouldn't be around today since that was 150+ years ago.  I was actually at Gettysburg for the 150th anniversary on July 3, 2013 and there were more of us tourists there then than there were soldiers there in 1863.  

My third book recounts what would have happened, maybe, at Gettysburg had Jackson lived.  In Book Two, he was saved by a slave from being shot.  I like irony.

would they have gone to the right like Hood wanted

I used to live in a town with a lot of 1870s architecture. For ... a reason.