I have had many of your books and am slightly confused. I am currently looking at HTML &XHTML 6th edition. Now, it has a publication date of 2006 and still perports to cover ONLY HTML 4.01. My 4th Edition book covers 4.01 and now it seems (from error reports in Amaya 11.2) that the specification has changed. What should I do? Does the 6th edition cover HTML 5 as the w3c web site says this is the latest version?