Eric Meyer, who for years has served the community with his excellent knowledge of the CSS specifications drives it home in this his first of two books on creating sites with CSS. He takes a very easy to follow project and task based approach to breaking down the problems and solving them in a clear and easy to read manner, as always.
Full of techniques I use till this day!
I know great CSS authors who swear by this book as exactly what it says, their definitive guide to CSS.
Written by the guru of CSS Eric Meyer who knows the specs inside and out, this book has excellent examples showing the way CSS should work from floats to text styles. While targeted at CSS1, its essential for the theory and foundation without a doubt.
Like most all O'Reilly "definitive" books, it has fantastic rule by rule syntax reference.
Highly recommended to anyone just starting out with Standards based CSS-based development.
Designing with Web Standards is the Absolute Must definitative guide to the whys and hows of creating Web sites using Web Standards. If there's any book to have, this is it.
If you're after ammunication to convince someone or need convincing yourself, this is the book to have. It starts with theory and ends with practical examples.