A cover is any image file that represents the cover of the book. It can be included in the root folder alongside the other files, or in a special image folder if you like. Its exact location is listed in the manifest. The default position is to include it in the root folder.
You can call it anything you like, but for simplicity it is recommended you stick to “Cover” e.g. Cover.jpg, Cover.png.
Size and dimensions
There is no standard for these. However, if you want a starting point, use this.
- Width = 1563px
- Height = 2500px
It can be any standard image format.