Depending on how you focus your reading, there are a few books that might be of interest:
Ordinary Men: Reserve Police Battalion 101 and the Final Solution in Poland by Christopher Browning
Shows how ordinary German citizens assisted in the murder of Jewish people during WW2. Giving personal accounts and historical documentation.
Alpine Elite by James Lucas
I'll steal from an amazon reviewers statement:
Still today, this book "Alpine Elite: German Mountain Troops of World War II" by James Lucas is one of the best English Language sources on the German mountain divisions of WWII. Based on extensive research and interviews with some 200 former members of the Gebirgsjaeger, the book provides both a stirring narrative of the exploits of the mountain units and a wealth of information on their equipment, organization, and tactics. It is an indispensable reference for persons interested in combat in mountainous terrain.
The Wild Blue : The Men and Boys Who Flew the B-24s Over Germany 1944-45
by Stephen Ambrose
This book follows the crews of B-24s in WW2
D-Day: The Battle for Normandy
by Anthony Beevor
This guy does great research, gives views from all sides through historical research.
The Last Stand of Fox Company: A True Story of U.S. Marines in Combat
by Bob Drury
This book touches on a Company in Korea near the Chosin Reservoir, well written.