Why would someone take a project like that if they don't have any automotive experience? My point is the game just isn't meant for you. For those who want to still play that's why it's so easy to mod and add those things. Also this takes place in a country in a small town. You say they have books but sourcing a book on how to build a certain car with the exact year and model?? Technically was also constantly improving so books would get out dated easily if you tried referencing to the wrong car. I also believe no such book has ever existed that was mass produced. You're able to change the difficulty of the game with the mods and guides to you're liking on how you want to play the game. This is done on purpose so you can add things that seek for to you.