This book covers a staggering array of topics around helping people find, use, and return to your website. I'm generally pretty cynical about SEO, but this book starts from the correct perspective - you have to have great content that people will want to find. It then builds on that concept by providing tips on everything from creating search engine (and user) friendly urls, to minifying your css to slightly reduce load times, to setting up email newsletters to keep sending content out to your users. I think this would be a worthwhile read for people of all skill levels, even owners of websites who don't know anything about code (there are some code heavy sections, but you could always skip those).