I shall be hosting three authors on their blog tours this month. They all write very different types of work. You'll find it interesting to learn about them.
Blog tours are increasingly popular as a way for authors to become better known to their reading public. Some writers organize their own tours while others engage someone like Dorothy Thompson to arrange the details.
As Dorothy explains, they're easy enough to arrange. However, authors come to her because they don't have the time.
Also, if you'd like to host authors, let your author friends know. This doesn't have to be a complete tour, just a visit and interview at your blog.