Head First HTML with CSS & XHTML

Great format - very easy to read and understand, and the information really sticks with you. I would recommend these Head First books to anybody interested in getting involved in working with HTML, XHTML and CSS.

Only 4 stars, however, for starting with HTML and not using strict XHTML requirements (for example, not teaching the need to close single tags until midway through the book) - why teach something and then add the caveat later that the instructions were incomplete?