According to the epigraph, this puzzle is a little similar to the third puzzle.
No. Where the door appears in the narrative has no bearing on this puzzle or any puzzle.
They are important words. But make sure you read all of the inscription. It's not all nonsense.
You need to find them. They will be difficult to find. I know. Sorry. Probably not as hard as the previous puzzle.
Look at the epigraph. "See what doesn't unfold."
Yes, you need to know a bit about folds.
Remember how the pages are anchored. Also, the door gives you a view point. Also, only vertical words count.