The overall composition on the cover can include visual elements-from photos and paintings - to a logo, monogram, ornaments, emblems, symbols that are relevant to the subject of your work and its content. Such inserts should not only have artistic value, but also carry a semantic load. Do not forget that many images are objects of copyright, and if you have not signed a contract with the copyright holder of the image you need, then it can only be used for non-commercial purposes. But there is always an option to find photos or pictures on free resources. Or make a photo or collage yourself.