VI is the worst editor around. Period. Having said that, this nice little book is you companion in making things better. You will learn to make do with vi, which i effect is a kind of Swiss Army knife editor. It can do tremendous things, for a small and silly editor.
This book eases down the terrible way in which vi switches back between editing mode and beep-mode.
After reading the book I got hooked to jed, joe and nano.