The inner artwork includes images of other dinosaur skulls steganographically overlapped in a similar manner to the front cover, including a pachycephalosaur and an ankylosaur.
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The two skulls, when revealed, combine to form the image of the Devil.
Devil | The Devil Wears Prada | The Devil Wears Prada (film) | Walking with Dinosaurs | Sympathy for the Devil | Art of the Devil 2 | The Devil in Miss Jones | The Devil Came on Horseback | The Devil and Daniel Webster | Devil's Island | Devil's Elbow, Missouri | Devil's Elbow | devil | The Devil Went Down to Georgia | The Devil's Rejects | The Devil Rides Out | Ice Age: Dawn of the Dinosaurs | Devil's Punch Bowl | Devil's Peak | Carter Beats the Devil | Bwana Devil | To the Devil a Daughter | The White Devil | The Devil's Crown | the Devil | Shout at the Devil | Robert the Devil | Jersey Devil | Invasion of the Dinosaurs | Devil's Peak (Cape Town) |