Whoever said that people should not judge a book by its cover seriously lacks an understanding of basic human nature.
Especially in this age of short attention spans, we won’t even bother to leaf through the pages of a book with a boring cover.
Side note: I hope you didn’t take this blog post too literally. I’m trying to be metaphorical here.
So, as an author or publisher, the best way to “deal with it” is to design a better book cover.