As a small tackle shop owner, and not a marketing Guru, I found this (as well as many of the Dummies books) to be worth every penny a hundred times over.
Because of this book, our web site and plan got an overhaul that WORKED. Straight forward advice, links and dos and don't about getting your website out there, useable, web friendly, and real world ideas on how to bring qualified traffic to your site.
I would suggest this before you dump money into adwords, or any other strategy you find online at random.
We found connections inside to usability studies, digital customer service tips, real working costs of aquiring new customers, guerrilla marketing techniques.
Simply put, if you have a website, or are getting one, you need this book. I will be buying an updated copy with every new release to keep on the cutting edge of what REALLY works in the digital world.