SitePoint, a great resource for anything web-related, is giving away The Art & Science of CSS as a PDF. It is only available until December 2, so be sure to take advantage of this offer soon. They’ve given away sample chapters from their books before, but this time it is the full book. Yep, that is over 200 pages of CSS goodness just waiting to be absorbed by your tech-hungry brain cells. 

All you have to do is either give them your email or follow then on Twitter. Either way you get a great CSS guide for the price of a glass of water (tap water—not bottled). While you’re there, sign up for their email newsletters.