i will try to make one with the more needed calcs, in the sense of frequency, am not planning in making a phisics book, like with all the teory behind everything, a more pratical book, you can check for now the pdf in the github, the thing is i don't have that much experience with KSP, so i am getting the formulas that i needed in my game, i think for more specifics topics they need a pdf, but i don't know what is better, the LaTeX make very easy to take chunks of books and create another book with that. For now, i think is better to make a little chapter with the "most used concepts", and chapters that dig deeper in the topics. I am up to yours toughts.