Want to know how your dust jacket design is going to look after being worn by a pile of books stacked in a book store? Then why don’t you download this brilliant dust cover book mockup and check it out yourself? The background is editable, and I’m sure you already have a color in mind that brings out the best in your book cover designs.
On the other hand, since you get a couple of books to design with your cover artwork, there’s also the option to insert a different design for each if it’s a portfolio you want. See how practical a piece of graphics can be? Enjoy it!