When it comes to search engine optimization, we have two kinds of books. One group of books are designed for people who have no idea what search engine optimization is and how search engines works. These books are great for those who want to know enough to be dangerous. The second group of books is written for more advanced search engine optimizers. They are designed to teach the pros how to optimize sites based on certain technologies for search engines. Technologies such as PHP and Flash are not that difficult to optimize for search engines, but things can get a bit technical. No wonder these topics are not covered in beginner books.
If you have gone over your beginner SEO book or just want to learn more technical SEO tricks, here are 4 killer advanced SEO books you should read:

Search Engine Optimization with PHP: a wonderful book that teaches you how to optimize your PHP side for search engines. In case you haven’t noticed, software packages such as WordPress are based on PHP, so this book is a must read if you have a PHP site or a WordPress blog.

Search Engine Optimization for Flash: a lot of SEOs tell you that you can’t optimize Flash for search engines. Things have changed in the recent years, and Adobe is working hard to make it possible for developers to optimize Flash for search engines. If you want to learn the latest wasys to optimize Flash for search engines, this is the book to read.

Building Findable Websites: I was very skeptical when I picked up this book, but it’s one of the best SEO books around for designers. Not all designers understand the art of SEO, so this book is a must read if you are in that group.

Website Optimization: now this really gets down to the nitty gritty. It shows you what you need to do to optimize your landing pages, your sites performance, and the load times on your website.
You can always refer to “for dummies” book to get your SEO basics. But if you are ready to take the next steps, then you should pick up the above books. They are technical. But that’s why I like them.





