Instruct: Classify Amazon reviews into positive or negative sentiment
Query: the definitive reference for HTML

For me the most useful part of this book is the 100 or so pages of HTML specification. It specifies the elements, attributes and values accepted by HTML 4.0, IE and Netscape browsers. This is worth the price of the book.The CSS/DHTML sections are somewhat harder to use. I sometimes have to look several places to find what I am looking for. It is a better reference than guide or tutorial. If I was going to work on a complex DHTML project I would look for another (perhaps newer) reference.There is also a large Javascript/DOM reference section that I never use. I prefer "Javascript the Definitive Guide" for this subject.