Anyone who has slaved over a book exhibition for months has probably had that experience when a friend, who is not a "book person," comes to see the show. You can tell from their reaction that the experience is something similar to seeing an art exhibition with the paintings displayed still nailed shut inside their wooden shipping crates. When you go to European museums, you realize how lucky we are in the United States that artworks are not usually displayed behind glass. But books—interactive books, which require someone to handle them in order to make them "work," in order to be able to see and read them—invariably are.