Sitepoint books have been a lifesaver for my web development. Their latest title is a great beginner’s guide to building a solid, modern, up-to-standard website.
They’ll walk you through the basics of HTML and CSS, so no prior knowledge or experience is needed. Whether you’re working with WordPress or straight static HTML or are making headway on an e-commerce site, check out this volume for the basics you need for a great site now and in the future:
Link: SitePoint Forums – Now Available: "Build Your Own Web Site The Right Way Using HTML & CSS".
By the way, as your knowledge grows, or as your want to learn more, I highly recommend their 2 books on CSS: