A long time ago, I went to a school fair with my daughter, and while she walked around the shelves, I noticed they have a trailer coming on a screen. I thought it was strange, if not disappointed to have a tv within the book sale, but to my surprise, it wasn't a movie or show, it was a book trailer.
A wonderful idea, because with such a good visual, a little mystery, music to create atmosphere, and a lot of pictures, any book gives a great introduction. Better than reading at the back cover!