In some of the screen shots I've used you will see ads for books. (turbofuture.com)
It's like a little film and after I saw the ad I got upset that I can not make such good ads for my books. (penelopetrunk.com)
This is, however, a commercial site and, particularly in some of the later modules, visitors will have to navigate ads for books and music to get to the information. (educationworld.com)