It's common to have help from friends and relatives outside the book business: a few hawk-eyed, literate "ordinary people" who serve as beta readers to detect and report on what the highly paid pros invariably miss.
I twice learned the importance of having ordinary people hold a physical book before publication in order to judge their reactions. You need these "beta holders" in addition to beta readers.
(Beta is the second letter in the Greek alphabet and comes after alpha. Alpha and beta
are the equivalents of A and B and gave us the word "alphabet." With computer software, the "beta version" is the second version (actually it may be the 943rd version). It is almost ready for distribution to the public but probably has more "bugs" in it than the final version will.
The beta version of software is made available to "beta testers" who will use it and probably encounter problems that will need to be fixed before the software is made available to everyone. The book business has followed the pattern of the software business in having beta readers. I've never heard of alpha readers. Presumably the alpha readers are the author and editors.)
The second situation happened in 2015.
I would not have caught either of these problems if I did not let amateurs hold my books. Beta holding can be a critical part of book production. Try it with your next book.
I also changed the "bestseller" text from three lines to one and combined it with the rest of the text at the bottom of the cover.
NOTE: The realistic fake covers shown in today's post were produced with MyECoverMaker -- a vital resource for anyone designing and selling books.