Instruct: Classify Amazon reviews into positive or negative sentiment
Query: A superb book on web optimization

I have always wondered how some websites managed to get top rankings in most of the major search engines. What techniques did they use? This book seems to provide much of the answer. The authors discuss general techniques in the first two-thirds of the book, such as the use of key-word phrase, meta tags, and more advance topics like doorway pages and cloaking. In the remainder of the book, the authors take a close look at the strategies that apply to each major search engine. Understanding those techniques alone is not enough, a lot of hard work and much ingenuity are needed to perfect them. The reader must have basic HTML knowledge to understand the stuff presented. Overall, a very interesting read.