Super interesting! As an aspiring gamemaker, can I ask what software you used to make this?
Viewing post in The Shaman, the Outsider, and the Diet of Worms comments
No "software" per se, this was just done in raw HTML and some JS by hand. I don't recommend that at all because even at this scale it became massively unwieldly and bug-prone. If you're looking to make a wiki-like, you might have success with something like TiddlyWiki, but I don't have much experience using it myself. Twine might be an option as well, but in either case you'll probably need some custom frameworks to have things like comments and edit histories.
The book was written like any book is and typeset in Illustrator. I'd recommend using InDesign instead if you have access to it; Illustrator isn't really designed for book typsetting, but it's workable if you know how to use it.