I like design that highlights words in one summary and links them to highlights in the next. It's a cool idea

But so many of the links just don't make sense, as several comments have pointed out. Are these actually supposed to represent connections between books, or is it just a random visual effect that's suppose to imply they're connected?

I clicked on one category and it has "Us/Them" linked to "fictions" in the next summary. I get that it's supposed to imply some relationship but I can't parse the relationships