Source material “The Year that changed Hitler”
Books:
Ian Kershaw: Hitler
Adolf Hitler: Mein Kampf
A. N. Wilson: Hitler - a short biography
Other texts:
Hitler’s letter to Gemlich 1919
Other podcasts used as background information:
The Rest is History episodes with Ian Kershaw, plus the rise of Nazi Germany-episodes
BBC Radio 4: Nazis: The Road to Power
History Extra Magazine podcast: The Rise of Hitler with Frank McDonough