For what its worth, the McDonald and Blue Springs area of Cleveland is where a bulk of the Army of the Cumberland spent several months camped during the winter of 1863-1864. That whole general area produces relics if you can get permission to swing a detector. Back in the late 90s and early 2000 it was easy. Now, that area has been developed so much that it's hard to find places due to having to get permission from so many people. Back when I hunted the area, one farmer might own 600 acres...and now all but a couple of those older gentlemen have died and their land sold/developed. There used to be a Yankee camp thst produced a lot of good finds on Dalton Pike that is now a massive subdivision. I bet I personally dug a thousand minie balls out of it but it's all gone now. That general area is a great area if you can find places to hunt. I sold all my stuff a couple yrs ago just because I never got to go. The last good place I had, was just starting to get housing development on it anyway.
He will enjoy those books...particularly the Howard Crouch one. The other one can be found but don't pay over the top prices for it on Amazon and such. If you can find a new one for under $70 online, you had better jump on it though.