"Panzer Warfare on the Eastern Front"- A collection of stories written by German soldiers on the eastern front, some I find questionable but you never know, great read.
"Armor and Blood: The Battle of Kursk"
"Tigers in the Mud"
"The Storm of War: A New History of the Second World War"- This book covers the whole war but it has some great chapters on the eastern front.
"Stalingrad: The Fateful Siege"
"The Last Battle"- Cornelius Ryan, its about the battle of Berlin
Thats just a few, hell I need a few recommendations to!