If you'd like to be creeped out by what corporations, marketing, and media companies are doing to solicit and keep your business (and in the end, your $$), this book is for you. You may think those little "cookies" you clear out of your browser's cache every couple of months mean nothing, but really, they mean everything. They determine what ads you see, what offers/coupons you get, and what audience segments you fall into when data aggregators decide to collect all your information and sell it to the highest bidder.
Frankly speaking, it's worth knowing about, this business of buying and selling personally identifiable (PI) data. You should know that you're constantly being bought and sold over the Internet, and at times, your online information is being linked off-line, too. Keep in mind though, that this book can quickly become out of date, as mobile technologies change the nature of buying, selling, and tracking data. I imagine an update to this book by 2014 or 2015, if Turow can keep up.