How to Judge a Book by Its Cover

I am the queen of judge a book by its cover. For me, when I look at my bookshelves, I have the most black books and the most red books. But I don't have a lot of green books. There are categories you could consider in books as well. So there's obviously prose. And then there's poetry. There are plays, graphic novels, workbooks. Do you think these are helpful distinctions to start with? Like what kind of book am I looking for? Yes.