Blogwild!: A Guide for Small Business Blogging, by Andy Wibbles
I liked this book because it delivered what it promised. It's a perfect introduction for a small business owner who doesn't know much about blogging but knows s/he needs to get on board. It's concise and to the point, and not too technical. My only criticism is that all of the "how to set up a blog" etc. information is based on a Typepad platform. It would have been nice if this book had been more relevant to other blogging services.