You can see the books but not the order. Anyone who has read one of them now has a stake, because their favourite might sit at the bottom. The ranking is the payload and it stays hidden until you click.
How the packaging works
Title
It promises a full worst-to-best ranking with a personal verdict.
Thumbnail
It fans recognisable covers around her face so readers spot their favourites.
Remix this
When you rank things your audience already knows, show the real items and hide the order. Recognition pulls them in and disagreement does the rest. Pick covers or logos people spot at a glance.