Cool, I just wrote a book! (I wrote the seven new chapters.)
Two of the most popular editors are vi (and its work-alikes), and emacs. This is O'Reilly's first new edition of their classic "Learning the vi Editor" in ten years and it was an honor to be part of the new release. Love vi, love emacs, it doesn't matter, I'm glad O'Reilly committed to updating their entry for vi.
(and my name is not Arnold, and my name is not Linda.)