A Few Notes on the Culture by Iain M. Banks
Firstly, and most importantly: the Culture doesn't really exist. It's only a story. It only exists in my mind and the minds of the people who've read about it.
Looking for a void to fill my Culture shaped hole in my soul, I stumbled upon this essay written by Banks that explains many different parts of the Culture that are only mentioned briefly in different books: culture of the Culture, their philosophy, their tech, more info about orbitals, and their politics.
This is for anyone seeking to gain a deeper understanding of the Culture, and the Mind, Banks, who put it all together.
A short but brilliant read that caps off my completion of reading the whole Culture series from 1-10.