No offense but you were not the first to make a leather book cover. Or put an elastic band in it or a pen holder and image. Even tho he said he saw your work and copied it I'd say you have no grounds for anything here. And if you did you should hold onto whatever money you have for when the next person comes along and says you copied their design for your book covers. I'm not meaning to be rude or belittle what you have created but you didn't do it first. If you...or anyone want to win this race then market smart, sell better, sell more and sell faster!