What set of books or resources would you recommend as a good introduction to this trifecta of technologies? (HTML5/CSS/Javascript)

Mark Pilgrim's "Dive into HTML5" book draft:

http://diveintohtml5.org/

ppk on JavaScript:

http://www.quirksmode.org/js/contents.html

Mozilla's documentation:

https://developer.mozilla.org/en/HTML/HTML5

CSS3 Preview:

http://www.css3.info/preview/

HTML5 draft specification:

http://www.whatwg.org/specs/web-apps/current-work/multipage/

Much obliged; thank you!

There's http://diveintohtml5.org which I don`t believe is 100% completed yet. I guess it's still too early for a comprehensive book - HTML5 is still in draft mode.

Didn't stop people from writing PHP6 books ;)