RE: Pre-war Germany the United States was full of differing reactions to what was going on in Germany. My mother remembered German exchange students singing Nazi songs in her high school in New York City.

RE: "A Man Called Intrepid" read this a few years ago and I understand it's considered somewhat mythological regarding the importance and ever-presence of its main character. I am not steeped in the historical events but the book left me suspicious about the central character and what really happened around him.

Just read an interesting book of fiction based on a real period of history: "Germania" by Brendan McNally which is placed at the end of WWII at Hitler's demise and the brief reign of the Doenitz government in Flensburg. It is somewhat fantastical with its fictional characters but so are the real-life events of the time. It was a good read and I'm still ruminating on it.