If anyone has recommendations on a book about Operation Barbarossa or the Eastern Front of WW2 as a whole, I'm all ears[/QUOTE]

I also agree with. . .

"When Titans Clashed: How the Red Army Stopped Hitler"
By David Giantz
and Jonathon House

A terrific, well researched history of the Eastern Front 1941-45. I read it several years ago, a few years passed, and I read it again.

Another good read is "Endgame 1944"
by Jonathan Dimbleby

It covers the Red Army's crushing advances of 1944.