An excellent introduction to CSS3 - both what you can do with it now and what is proposed for the future.
Writing about something that is still only at a draft stage and subject to change is a far more difficult task than writing about something that is an established standard. This book makes it very clear that doing so is not impossible. Even though the book is dealing with something that is in effect a moving target it manages to almost keep up with the changes that occurred before the book was finally published.
This book is also a very practical guide and concentrates mainly on those parts of CSS3 that are actually usable in web pages and goes into great detail as to how to use what the browsers currently implement. It also discusses how that varies from what the current proposal currently says and indicates what changes we should expect to happen in the short term (as a working draft we can't really tell what will happen long term although the more browsers support something now the less likely it should be that it will change).
This book starts with the most usable parts of CSS3 and moves progressively through to some that are only supported by one browser so far and finishing with a chapter on the best of the CSS3 modules that are yet to be implemented at all. This presents the information in the most useful way for anyone who wishes to use any of the CSS3 that is actually usable.
This article written by Stephen Chapman, Felgall Pty Ltd.