A couple days ago I showed you an example of how a book cover could take advantage of active content. Here's another example, and like the first this one is intended as a proof of concept rather than a functional design.
Nate Hoffelder is the founder and editor of The Digital Reader:He's here to chew bubble gum and fix broken websites, and he is all out of bubble gum. He has been blogging about indie authors since 2010 while learning new tech skills at the drop of a hat. He fixes author sites, and shares what he learns on The Digital Reader's blog. In his spare time, he fosters dogs for A Forever Home, a local rescue group.