Book Advertising

Okay so while I was watching the premier for "Lost" last thursday an interesting commercial came on. It was a commercial for a book. As I watched this commercial I was trying to guess what movie was coming out or what sequel to a movie they were trying to advertise, but to my surprise they were actually advertising for a new book. It made me wonder why more authors and/or book publishing companies don't advertise their new books more. Maybe if they did it would guarantee a best seller every time. I mean TV commercials advertise everything from food items to foot cream yet we still never see advertisements for books. Maybe one day our society will become intellectual enough to want to watch commercials about books and novels instead of car and beer commercials.