Bookshelf wallpaper a go-go

Is bookshelf wallpaper a force of good or evil? On the one hand, putting it up on the walls of a room shows an appreciation of books. On the other, it may be that the appreciation is of the look of books as decor, rather than as objects that can be lifted off a shelf and actually read. Either way, in recent years bookshelf wallpaper has proliferated; here are some notable designs.