Were you specifically looking for a square book mockup? Here it is. There are seven high-quality PSD files with simple layer setups, showing different angles including the cover and the inside pages of the book so you could have the freedom to display your designs properly. The background can be changed to your taste, so choose something to highlight your book the best way possible.
You can use this square book mockup for your artbook design presentations and other stuff. This set comes completely for free and you can get this scene right now and start getting reading in no time by adding your designs via the smart layers. If you have other projects coming your way, you might want to take a look at our rich collection of different kinds of practical mockups. Good Luck.