Star Wars: The Last Jedi brings a lot to Star Wars lore, including the introduction of the ancient Jedi texts found in the Tree Library near the first Jedi Temple on Ahch-To.
The Journal of the Whills isn’t a concept that has been featured prominently in a Star Wars movie yet, but they were at the core of George Lucas’ original conception of the Star Wars saga.
The Jedi texts will doubtless play a role of some kind in Episode IX (even if it’s not explicit), but it’s not sure if the Journal of the Whills will rear its head again.
Instead, the books (as could always be deduced from the Jedi logo on the cover) were actually ancient Jedi texts.