I have a new version of my emacs tutorial ready.
If you've bought it before, please just email to email@example.com with subject “emacs tutorial upgrade”. I'll email you the download location. Sorry i don't have a automatic update system. So just send the email please if you would like the updated version.
If you haven't bought it, you can get it for just $10. See: Buy Xah Emacs Tutorial. As far as i know it's more complete and detailed tutorial than any emacs book, printed or not, especially the elisp section.
Thank you for support!