If you need to give a full presentation of your book design, I shall say this mockup couldn’t do a more fantastic job as it already offers 7 different positions. Plus, it provides you with the benefit of showcasing both the cover design and the pages as well. The well-organized layers make sure you can easily import your artwork on the book and change the background as you want.
Download this gorgeous book mockup and use it throughout your presentation. This way, you won’t need to search different websites just to find a couple of individual mockups that barely match each other. Instead, for example, you can start with a closed book and go on to open it and then flip through it little by little.