[$] Mastering Emacs

A series of rabbit holes, some of which led to unshaved
yaks,
recently landed me on a book called Mastering Emacs.
Given that I have been using Emacs 'professionally' for more than 16
years—and first looked into it a good ways into the previous century—I
should probably be pretty well-versed in that editor-cum-operating-system.
Sadly, for a variety of reasons, that is not really true, but the book and
some concerted effort have been helping me down a path toward Emacs-ian
enlightenment. Mastering Emacs may also help others who are
struggling in the frothy sea that makes up Emacs documentation.