Good resources on how to write Emacs modes?

Can anyone recommend a good resource for getting started on writin开发者_StackOverflowg Emacs modes? Specifically, I'm looking at what it would take to write a syntax-highlighting and indentation mode.

http://www.emacswiki.org/emacs/ModeTutorial

I learnt how to do this from O'Reilly's writing GNU emacs extensions.