The wartime memoir of Siegfried Knappe. Exciting read by a good guy and excellent soldier who was on the wrong side. BTW, most German soldiers were not members of the NAZI Party. After the war, he and his wife had a good life in Iowa.
From Amazon:
Based on Knappe’s wartime diaries, filled with 16 pages of photos he smuggled into the West at war’s end, Soldat delivers a rare opportunity for the reader to understand how a ruthless psychopath motivated an entire generation of ordinary Germans...