PCGamer has posted an article called "Crusader Kings 3 is, unexpectedly, the latest videogame to receive an official comic book".
I am TBH as surprised as the author of the article that a grand strategy game is getting a comic book, as it's not exactly the genre which is destined for this.
It seems this comic book is at the same time educational as well as promotional, since it features the story of Basil I of Byzantine, which you will be able to play in the next DLC "Roads To Power" for Crusader Kings 3.
The DLC will be released on September 24, and the comic book will be already available on August 22 (on Steam and the Crusader King's website), so you have ample time to read it before you play the DLC.
The article: https://www.pcgamer.com/games/strat...-videogame-to-receive-an-official-comic-book/