The best book I have read about WW II in Europe is "The Last 100 Days" by John Toland. It was published in 1964, and the author interviewed many of the men involved, including Generals and Field Marshals from both sides of the conflict.
I agree. It's very, very good. My favorite Toland book, though, probably is "Battle: The Story of the Bulge." It's right up the OP's alley with incredible and very interesting details of the tactics and operational developments in the BoB.
Another superb one with similarly-excellent tactical detail. is John Keegan's "Six Armies in Normandy"--about D-Day and the rest of the 1944 campaign.
The best WWII book I ever read, in terms of making you feel like you actually were there, is "Islands of the Damned: A Marine at War in the Pacific" by Romus Valton "R.V." Burgin. But, obviously, that's not about Europe.
