

For the around the world in 80 days book cover, it has a more interactive use which is different from normal book jackets. The actual cover of the book takes two forms one as that actual book cover underneath and a detachable sleeve for the front which includes a multi-choice spinning wheel.

The Journey to the Center of the Earth book cover also has to ways to view the cover one takes form as an illustrated acetate dust jacket, which when removed reveals another layer to the book covers image.

For the 20,000 leagues under the sea book cover, it uses a smaller dust jacket that when removed it reveals different imagery underneath. This works really well and adds more depth to cover creating the option of two different covers.

The last book in the series uses a pulled down mechanism to reveal the imagery underneath without having to remove the whole dust jacket. This adds to the interactivity of the book itself and isn't just a plain book but something that interesting to keep on the shelf.
Each book keeps to a themed colour scheme and in doing so makes it seem more of a collection. Having both a dust jacket and a different book cover underneath gives the book a bit more depth and interactivity to it, which is something I could take in to account within my set of books.