Welcome to the first annotation! Annotations are extra information that were mentioned in the previous chapter, or teasers for the next chapter. In this case, the main article refers to the situation Harris was talking about on page thirty one-- the other articles ??? What could they mean?
They will never be in a comic format, and will feature different styles and media in order to tell extra information in a different way. These are canon and will be posted as if it's a regular update because they are relevant to the story. (and so I'm not making people search for updates)
There's a myriad of reasons for doing this, but mostly it's that I just like worldbuilding so there's a lot of backstory and side stories that could be left as mere mentions but it's more fun to share them. The other major reason is that it gives me a few easier updates in order to set up my next chapter, rather than taking a hiatus. Hopefully, it will be interesting for everyone as well!