As previously noted, Rick Atkinson's Liberation Trilogy is excellent. Well worth your time to read.
For a decent overall perspective of World War 2, Winston Churchill's 6-volume history on the Second War War is good.
A decent single-volume history is by B. H. Liddel Hart, "History of the Second World War".
For a good overall Eastern Front history, John Erickson's 2 volume history, "The Road to Stalingrad" and "The Road to Berlin" aren't bad, although derived from Red Army official sources(meaning the Red Army's "heroic" official sources), has been superseded by others as more archives were opened up in Russia after the Communists were disposed of.
Any Eastern Front book by David Glantz is worth reading. "When Titan's Clashed" is a good single volume on the Eastern Front. Would also recommend his books " The Battle of Kursk" and "Red Storm over the Balkans"
On Marshall Zhukov, would recommend "Stalin's General" by Geoffery Roberts.
On the Red Army Air Force would recommend "Red Phoenix Rising: The Soviet Air Force in World War 2" by Von Hardesty and Grinsberg
From the German perspective, I would recommend
"Lost Victories" by Eric von Manstein,
"Achtung Panzer" by Heinz Guderian,
"Panzer Battles" by von Mellenthin,
"Order in Chaos" by Hermann Balck
"Panzer Aces" by Franz Kurowski,
"Panzers on the Eastern Front" by Erhard Raus, edited by Peter Tsouras,
"Panzer Warfare on the Eastern Front" by Hans Schaufler
On intelligence/spies, I would recommend ...
"The Game of Foxes" by Ladislas Farago
"The Ultra Secret" by Winterbotham
Western Front Books worth your time...
Cornelius Ryan's "The Longest Day", "A Bridge too Far" and "The Last Battle".
Carlo D' Este's "Decision in Normandy". "Bitter Victory: The battle for Sicily 1943", "Fatal Decision: Anzio and the Battle for Rome" and "Patton: A Genius for War"
Lloyd Clark's "Crossing the Rhine" and "Anzio"
Stephen E. Ambrose's "Pegasus Bridge"
"Endgame 1945: The Missing Final Chapter of World War 2" by David Stafford
'Brothers: Rivals: Victors -Eisenhower, Patton, Bradley- and the Partnership that drove the Conquest of Europe" by Jonathan J. Jordan
"Monty's Men" by George Buckley
John Keegan's "Six Armies in Normandy"
US Naval History/ Pacific War...
Samuel Elliot Morrison's 14 (or is it 15 ?) volume history of USN in World War 2. If you don't have the time to read all 14 volumes read "The Two Ocean War"
James D. Hornfischers' "Last Stand of the Tin Can Sailors", "Neptune's Inferno", "The Fleet at Flood Tide" and "Ship of Ghosts"
Gordon Prange "At Dawn We Slept" and "Miracle at Midway"
Edward P Stafford's "The Big E", "Little Ship, Big War" and "Subchaser"
E. B. Sledge's "The Old Breed"
"The Devil's Anvil - The Assault on Peleliu" by James H. Hallas
"Utmost Savagery: The Three Days of Tarawa" by Joseph H. Alexander
Eric M. Bergerud's "Fire in the Sky: The Air War in the South Pacific" and "Touched by Fire: The Land War in the South Pacific"
Mediterranean Naval Warfare
"The Struggle for the Middle Sea" by Vincent O'Hara
Airwar
"Horrido!" by Col. Raymond F. Tolliver
"Fighter" by Len Deighton
"The Forgotten Few" by Adam Zamoyski
Miscellaneous
Geographia "Atlas of the Second World War"
Just a few I can think of off the top of my head. I see what other's I can remember and recommend.
You've got your marching orders, get going!
HOA-KSOP aka ksbearski aka Barry