Blogs are having a significant impact on book sales. Take Freakonomics, for example. It's a bestselling book on the hidden statistics behind common riddles. It's getting a ton of media buzz. And yes, the authors have a blog, but it's bigger than that. They actively engaged the blogosphere as part of their marketing strategy by seeding advance copies of the books to influential bloggers - like Biz Stone. As you can see from the chart above, this was a smart move. The book is generating lots of love in the blogosphere. Product seeding - when it's a good fit between the product and the blogger - is definitely a PR strategy that can build word of mouse.
Robert Scoble points to a post about "Call to Action," another book that grew sales through word of blog. See a trend here?
