The term SEO (Search Engine Optimization) has become a new phenomenon with marketeers. As a programmer/developer it’s very hard to find a good book on such a broad subject but recently I found this great book. The authors go about explaining and guiding you through exercises that are relevant for both programmers and marketeers. It contains detailed chapters on Website Content, Links, Webmaster tools and MOD_REWRITE. The code snipets found in this book can be used as a good reference guide to any SEO project. This book is for PHP Programmers but they have also published a .NET version.
If you develop with Wordpress.org this releted post can also be very helpfull: SEO and Wordpress
