Click here to see the Halfway to Hell trailer, put together as a favour by a friend: Bob Martin of Production Cues.
Bob did this entirely off his own back, and spent a lot of time working on it. It looks great, and when you Google Halfway to Hell, this comes up way before the Facebook or Amazon pages, so it looks like it's getting some rotation.
If you like what you see and could use a fully scored and edited video to produce your book (or movie, cupcake business or... anything else, really), you could do a lot worse than checking out the Production Cues website. Bob does good work, and his rates are very reasonable.