Books
There are many good books on CSS on the shelves these days. These are the ones that helped me out the most and that I recommend wholeheartedly.
Cascading Style Sheets: The Definitive Guide, Second Edition, by Eric Meyer (O’Reilly)
Web Standards Solutions: The Markup and Style Handbook, by Dan Cederholm (Friends of Ed)
The Zen of CSS Design: Visual Enlightenment for the Web, by Dave Shea and Molly E. Holzschlag (New Riders)
Eric Meyer on CSS: Mastering the Language of Web Design, by Eric A. Meyer (New Riders)
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