I always wanted a book from O'reilly about CSS, but when I started using it (about a year ago), that book was out of date. But Eric Meyer wrote a post yesterday, where he explains that he has been "upgrading" that book. It now covers CSS2.1 and some parts of CSS2 (it is more likely that browsers support 2.1 than 2). I am definitely going to order Cascading Style Sheets: The Definitive Guide, 2nd Edition.
He also mentions another book: "More Eric Meyer on CSS", which is a sequal to "Eric Meyer on CSS", a great CSS book with lots of different techniques. I think I'm going to buy both of them.
And so am I!