[baddox]

Not a book, but I would highly recommend a web dev. plugin for Firefox such as Firebug that lets you view CSS attributes on every element in a page, as well as edit the CSS and see live changes.

[hwijaya]

I second that. I also pick and implement depends on what is need at the time. Example of when i need list: http://css.maxdesign.com.au/listutorial/