wtf is a "chapter book"?

It’s a book with chapters. Basically a regular ass book. When kids are real little, their books are like 15 pages long. Then in like 1st or 2nd grade, they move onto reading big kid books - aka “chapter books” that have enough pages to warrant chapters.

You never hear someone over the age of 7 or 8 mention reading “chapter books” because they’re just know as books.

Except anon, who is dumb as fuck.

There are regular books that don’t have any chapters. Most of Terry Pratchett’s Discworld Books are an example of this.
Really? I’ve read almost all of them twice and I wouldn’t have been able to tell you that lol
Terry does include breaks and beats in the stories that many other authors would adorn as a new chapter, but he never does. honestly imo that makes things almost filmic - for example where a switch in perspective usually prompts a new chapter and pushes an author to make it longer, Terry can just write a single page or even a few paragraphs to tease you a bit of what’s going on elsewhere in the story, and then go back to the usual perspective but now with the added context & tension

that makes things almost filmic

His early books literally started with a visual description of the reader’s imagination “camera” gradually focusing on Great A’Tuin, the Disc, whatever region the action was going to happen in, and so on.

Filmic is exactly what he was going for.