Hello,
troff.org <http://troff.org/> maintains a nice list of UNIX/networking books typed
in troff:
https://troff.org/pubs.html#advctt
https://troff.org/books.html#strong
There’s one book that’s been released out of the publisher’s copyright, transcribed, and
the source is available:
https://github.com/larrykollar/Unix-Text-Processing
Are there any other other long text/books that have the source code available?
The only thing that I can think or are the manuals present in source trees of the current
BSD systems.
Thanks,
Adam