So one of the things I have always loved about Skyrim and Elder Scrolls Online is the fact that you can find books and read them and when you do they'll level up a skill of yours. It makes reading the books feel more useful and is definitely world-building. I recreated an effect like that in Rpg Maker MV.
With this tutorial you'll be able to: Create a Weapon type and have books increase your damage with that weapon type every time you read a hiddle skill book in the game.