One of the easy ways to create a carousel of book covers it to first create a book list of all the books, and then pull the cover images of those books into a carousel.
When making changes make sure the ‘Apply’ buttons say “Apply (this display)” only. If the ‘Apply’ button says “Apply (all displays)” the changes you make will alter every display (Month, Week, Year, etc) of the view.
Set the ‘Items per page’ to be blank - this will allow all items added to the book list to be pulled in.
You can now enable the block on your site by navigating to Structure > Blocks and configuring it to be placed in a suitable region.
A simple way to display your custom products is to use a jCarousel to display their images.