If you aren't familiar with Web site optimization (WSO), it's a series of techniques that minimize Web page file sizes and maximize page display speeds. In other words, WSO is simple stuff you can do to the Web pages you create to make those pages load faster. After all, people HATE waiting for slow Web pages.
What King has done in "Speed Up Your Site" is not only assemble pretty much every WSO technique known to man, he's also collected the research and conducted the interviews explaining WHY these techniques actually work.
While the entire book is exceptional, the four chapters in "Part II - Optimizing Markup: HTML and XHTML" are absolutely worth their weight in gold. It is in these four chapters that King shows you, step-by-step, how to clean up HTML bloat; minimize HTTP requests; tighten up comma-delimited attributes; speed up table rendering; and much, much more. And the results will ASTOUND you.
For example, using the techniques in just these four chapters alone, I was able to make my NetSquirrel.com homepage 26.5% smaller and load 42.9% faster. Words can't describe how cool that is.
Let me also put in a plug for Chapter 15 - Keyword Optimization. This chapter shows you how to fine tune your page's meta keywords so that you can attract both search engines and, more importantly, visitors. Every Web design book tells you that you need to use meta keywords. King actually shows you how to find the meta keywords that yield the highest results. Instead of paying someone else lots of money to attract visitors to your site, follow the 10 steps that King outlines in this chapter. You'll save yourself both time and, more importantly, LOTS of money.
As I said earlier, Andy King's "Speed Up Your Site" absolutely knocked my socks off. There are a squillion Web design books out there, but this one belongs on the bookshelf of every serious Web designer.