Thank's for your praise!
Though I have to say that you are quite lucky, since it is only a beta
That is an interesting question, well, there are surely several. I fear I can only help you with lecture...
An overview would be this one here: https://www.amazon.de/Italian-Wars-1.../dp/0582057582
Which I have based most of the events/script on.
Classical topics would be of course Machiavelli(Art of War, History of Florence, Discorsi) and of course Francesco Guicciardini
Of course there are plenty of more titles
Best regards,
Aneirin