The flow works well, I particularly love the contrasting styles in each section. A great detail that added a growing sense of dread and dissolution was your steady increase of nouns in quotation marks.
Tone and word choice is not my strong suit; I tend to overdo it in my own work. I did feel like the first section could be a bit more direct in tone, cutting out excessive detailed description to focus the reader's attention on the protagonist's growing panic. If you hold off on really descriptive language in the beginning section, it will feel more gloriously satisfying by the time we get to the cocooning scene. Your descriptions of the creatures at this point are top notch supernatural horror, I was in awe.
Lore; don't rite yourself off ;). There's plenty of interesting ideas actually. At first I was like, "um, where are the butterflies in this story?" But then I was thinking about the quotation marks and I was like…… ahhh. I GET IT NOW: they're like tiny wings on either side of the text! So in that interpretation, the punishment for book burning is to be transformed into a sentient cloud of fluttering insects, with a collective intelligence and no sense of self. The only way they/it communicates is by quoting passages from other people's writing.
