List of recommended css books worth buying.
Responsive Web Design by Example
Robin Nixon’s CSS3 Crash Course
Sketching with CSS
Write CSS as fast as you can sketch.
Scalable and Modular Architecture for CSS is an approach to web development.
HTML and CSS: Design and Build Websites
This educational book is one that you will enjoy picking up, reading, then referring back to. It will make you wish other technical topics were presented in such a simple, attractive and engaging way
CSS E-Book Package (Volumes 1-3)
This e-book package is a collection of articles published on ImpressiveWebs.com.
CSS3 For Web Designers
HTML5 & CSS3 for the Real World
Powerful HTML5 and CSS3 techniques you can use today.
This list will be updated regularly.