Check out this Yellow Cover Book Mockup, which help you advertise your new book. Mockup greatly simplify the process of creating a great photo-realistic project and thus save your time and nerves.
This package comes with seven different book scenes in PSD files. To get an impeccable presentation, just put your designs in a smart object, and everything will be ready in minutes.
If you want to use this for your online store, it is also possible, as it has a customizable background color.