I think I realize the trailers aren't made for us. We read. We'll read the books even if there isn't a fancy moving picture (or not moving, as many seem to be slideshows... ok, well, the two I tried to watch) to draw us in. They are meant to draw in the people that *don't* read and perhaps suggest that they could make their own movie in their heads while they read? Or maybe so they'll see the movie first (trailer) and then want o read the book?
