Parent is probably thinking about the books in this series: https://www.amazon.com/Programming-Manual-Version-Definitive... , although the "official" X11 documentation, in the form of man pages and other docs, was pretty damn good (albeit I don't think it was 11 volumes).
Just seeing that cover brings the taste of coffee and very late nights spent at the lab back when going to bed at 2 AM and waking up at 8 AM to go to class was pretty easy.
There was a whole series. I don't remember how many volumes it had, it may have been 12 but I'm not sure. It covered a lot more than just the protocol, and it was extraordinarily comprehensive. It included pretty much everything you needed to know in order to write X11-related code.
Just seeing that cover brings the taste of coffee and very late nights spent at the lab back when going to bed at 2 AM and waking up at 8 AM to go to class was pretty easy.
There was a whole series. I don't remember how many volumes it had, it may have been 12 but I'm not sure. It covered a lot more than just the protocol, and it was extraordinarily comprehensive. It included pretty much everything you needed to know in order to write X11-related code.