Just finished up reading Handcrafted CSS by Dan Cederholm and Ethan Marcotte. I’ve read two of Dan’s previous books, and thought that they were great. So I was looking forward to reading this very much.
More so than in his previous books, this one really pushes the envelop of CSS and urges the act of rewarding browsers that support the latest CSS features. This is a stance that I’ve always agreed with, but can be hard to get a client to follow. Not all parts of a site have to look the same across all browsers.
My  favorite sections were regarding rounded corners with border-radius and flexible color with RGBA. His examples really sold me that it is now a good time to begin implementing these features for browsers that take advantage of them.
An extremely well written book, that’s also designed very well too. Highly recommended for anyone looking to push CSS boundaries, and pick up a few tricks along the way.