Ordered Professional Search Engine Optimization with PHP: A Developer’s Guide to SEO,

Here’s from the site:

We don’t hide behind concepts and buzzwords. We provide code, code, and even more code. Topics covered, with step-by-step examples and demos, include:
- Understanding the criteria that influence search engine rankings
- Building keyword-rich URLs using PHP, Apache, and mod_rewrite
- Using the HTTP headers to properly indicate the status of web documents
- Relocating content using the proper HTTP status codes
- Coping with duplicate content effectively to avoid penalization
- Avoiding being the victim of black hat SEO techniques
- Implementing geo-targeting and cloaking using IP delivery
- Promoting your site using web feeds and social bookmarking
- Optimizing your web pages using better HTML and JavaScript
- Enhancing existing web sites
- Using search engine and traditional site maps effectively
- SEO for WordPress blogs
- Building a SE-optimized E-Commerce catalog case-study

It’s written by these guys. Full review to follow once I receive the book and have the time to review it.