I just finished the Gylfaginning, the first part of the Prose Edda, the basis for our understanding of the Norse myths.
It’s entirely possible that the Prose Edda was a hoax from the get-go. I knew it was written by a Christian but until now I didn’t know its structure.
The myths are told to a mortal king by supernatural tricksters, allowing for the interpretation that they were all just a joke. (It undoubtedly was safer to write them this way.)
Oddly, enough I knew virtually every detail about the Edda. Unlike the Bible, Koran, or Bhagavad Gita, books on mythology pretty much picked this one clean.