Made quite a bit of headway today - thanks to the archivist at the Norwegian Resistance Museum (Hjemmefrontmuseet - http://www.forsvaretsmuseer.no/Hjemmefrontmuseet/Om-museet/Information-in-English). He took me to the library and showed my 6 books that I should read (all in Norwegian). I was able to purchase two books in English about the war, in particular, one about the Resistance Movement. Spent about 3 hours here working my way through the exhibits and talking with the archivist.
Spy stuff - film and other weird things...
Resistance Museum circled - next to the fortress - next to a giant cruise ship