The book is worth every penny. I bought mine years ago for like $25, and since then the author has published multiple new revisions and I still can download the

The book is worth every penny. I bought mine years ago for like $25, and since then the author has published multiple new revisions and I still can download them for free. Mickey doesn't do this for profit. There's a word in Japanese - "Ikigai" (you better google it, I'm typing this on my phone). For Mickey Petersen, explaining Emacs is his ikigai. If you're thinking of using Emacs for longer than two weeks, buy the book, you will never regret it.