In the Vyrso book TECHNOLOGY AND SOCIAL TRENDS: A Biblical Point of View, Chapters 3 and 4 appear blacked out, as if they were redacted/censored. I just bought the book, have not done any highlighting in it. I have no visual filters enabled. If I select where the black region is, I can select text there, and it becomes very faintly readable (because of the combination of selection color against the black background).

After dragging a selection:
