I've come across this kind of comment elsewhere, and the recommendation was that "the book" is Designing Games by Tynan Sylvester (the author of Rimworld)
Tynan's book is popular, but in my limited experience the first book most people recommend for anyone looking into design is Book of Lenses. Mind you I think both are worth reading. Lenses is just a more systemic and deeper dive.
That's why I put it in scare quotes; personally I don't believe The Book has yet been written. There's not an Art of War for every subject yet, and game design is one of those subjects not yet mastered, at least in writing.
sph|3 months ago
https://tynansylvester.com/book/
Haven't read it yet myself.
meheleventyone|3 months ago
runevault|3 months ago
bavell|3 months ago
PostOnce|3 months ago
rstupek|3 months ago