think different template

Hi there,

ibook authors is amazing, but I've a question about template.

All templates by default and even those that are for sale by third parties, are always in full page. But, if you browse book store you can find some books that mimic the book (you can see the outline of the book that protrudes from the pages).

How it works? It's not just a matter graphics, because if you use the book in landscape mode the book is smaller than the screen ....

I write a two links to clear what I mean:

https://itunes.apple.com/it/book/peppa-pig-nature-trail/id461713781?mt=11

https://itunes.apple.com/it/book/la-luna/id569609969?mt=11

How it works?

Thanks,

Vinc