Pro CSS Techniques by Dan Rubin, Ian Lloyd, Jeffrey Croft
This advanced CSS book is a must for any modern web developer to own. It is completely up-to-date, with information on browser support in all the latest versions and CSS levels 1, 2, and 3. Unlike beginner-level books that teach CSS in a lighthearted style, this one gets serious, giving CSS the proper, professional treatment it deserves. Each technique is presented in an informative tutorial style, with every point backed up by multiple real-world examples and case studies. The authors cover hacks and filters, code management, advanced layouts and styling, typography, and much more.