There are various books written on the battle's fought by the AOT. There have been quite a few written about Shiloh, Perryville, Chickamauga, & Franklin.
There are books available on Confederate General's who commanded the AOT; Johnston, Bragg, & Hood.
Also book's about specific unit's within the Army; "Tennessee's Forgotten Warrior's", "Frank Cheatham and his Confederate Division" (a personal favorite of mine as most my ancestors served in Cheatham's Division).
There's at least one book on Cleburne.
There'a good book written on the 9th TN. Inf., "The Confederate Ninth Tennessee Infantry" by Fleming, a descendant of member's of the Ninth.
A couple very basic & thin book's; Connely's "Civil War Tennessee" Battles & Leaders, & Cotrell, "Civil War Tennessee".
Of course there's "Co. Aytch" by Watkin's. A new revised & expanded edition was released a couple years ago.
There's actually quite a lot of reading one can do related to the AOT but as you pointed out no where near as much as is available on the ANV.
I'd guess there's even less available on The Army of Trans Mississippi than there is on the AOT.
D. Williams