Stock photos are royalty - free images you pay to download, that you can use for book cover designs or other projects. (creativindie.com)
A 50 % deposit (first payment) for book cover design work is due before book concept design work is started. (elegantbookdesign.com)
A great number of book cover designers typically forget publishing as much usefulness to the backwards covers after they do aided by the front. (blogigo.com)