I'm getting interested in book trailers now, mostly because I'm thinking I should probably make one for mine. As a reader, they're not really my cuppa tea as they say. I pretty much judge a book by its cover and jacket description.
It's hard to take a book's content and pour it into a trailer format, without losing the magic of letting the reader use their imagination.
I found a bunch of book trailers at Bookriot, but have yet to pick a favorite. I guess I'm still getting used to the idea of a trailer for a book.