I trained in school for museum studies, but like many younger historians, I don't work in the field as an adult.
I wanted to get suggestions for any of your favorite primary sources. I love reading from the words of people who lived it, especially the lower classes, soldier's, or common person's perspective. Some of my favorite are "Hardtack & Coffee" & "Co. Aytch" as good alternate looks at the American civil war for the gritty frankness of what life was like in the US 1860s (as an example)
What books would you guys say are your favorites from your period of study? What are the most true to life or stark looks at the time? I'd love to hear everyone's opinions.
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I'd recommend the diaries of Victor Klemperer, a Jewish university professor who lived in Germany through the war, and kept detailed diaries of what was happening. They're split into two volumes, named I shall bear witness and To the Bitter End.
A number of people who were part of the military resistance to Hitler also wrote memoirs, although many haven't been translated into English. I'd recommend taking a look at Fabian Von Schlabrendorff's The Secret War against Hitler.
If you're looking for a less memoir-y book about primary sources then take a look at Julia Boyd's Travellers in the Third Reich, which looks at travel accounts from foreign visitors to Germany during this period.