The superscripts are almost certainly references to translators’ footnotes.

The random italicization I’m less sure about, but it seems to primarily be on words that may not have a direct Hebrew counterpart?

This isn’t a particularly well thought out stance, but I do wonder if books are kind of self-selecting for appropriate audiences? As in, just being able to read and understand something in a book might be enough to warrant your permission to read it.

Movies and shows can be consumed more passively, with almost no maturity required to experience the media, so I can see why providing that guidance would be warranted.

But I don’t know, that stance might crumble under scrutiny.