Another couple of books to check out are :
John Ericksons The Road To Stalingrad & The Road To Berlin.
Full of details and info, but be warned in the first book there is a distnct lack of maps !- all sorted out for the second book !.
I HATE war books that lack maps!! Do these authors believe that the average person can keep track of 20+ opposing units of different size in battles that usually involve multiple hills, objectives, towns, airfields, and rivers?
Thats how I feel !
However, the second volume is totally different !:o
Lots of maps !
If it has maps showing what happened it has to be okay.