Several month’s ago I became familiar with Creo Productions. They are a full service video production company located out of Michigan. Some of the work they have done includes producing videos to promote books.
They combine narration with graphics to communicate in a short period a time the central message of a book. They are very powerful in comparison to reading a synopsis for a book. You can check out some of their work on their website.
On a side note, you can download a complete audio version of Pyro Marketing from Greg’s website for free.