What is under the book jacket

[Jamiety]

I've seen other books that offer a hardcover book that has the actual image on the cover. I can't seem to understand what's under the dust jacket that is optional with mypublisher. Is it just a plain color cover or is it linen with no window? Also, does anyone know how to create a double page spread using power point?

[hbdave]

Under the bookjacket is just a black linen cover without the window.

Go to the "Using Photo Editing Software" sectinon of the forums and doing a two page spread is mentioned quite frequently in here.