I have an interesting book that I recommend for specialists:
” Slaughterhouse: The Handbook of the Eastern Front”
by David Glantz
It is not an easy read, but has great information. Glantz had significant access to the Soviet archives, which he compares favorably to German military archives. He notes that every event has separate reports from command and commissar channels, so there are usually multiple views of major events.
I have the following Glantz books in my library:
When Titans Clashed
Stumbling Colossus
Colossus Reborn
Zhukov’s Greatest Defeat
Stalingrad Trilogy
Smolensk Vol. 1
Red Storm Over the Balkans
There may be a couple others; that’s just off the top of my head.