The Kindle sub-forum here at the WF is a great place to get your Kindle questions answered...
...but I put this question into the main forum because it is a general population question, and at any one moment a larger number of folks are here than are in the Kindle sub-forum.
Some 24 years ago, a chance remark from a friend gave me an ah-ha moment. I used the concept to develop a system, and I now have 24 years worth of documentation as to how well it works.
It is now time to put the system into a Kindle, and after KDP select, turn it into a printed book.
Do you see any "problems" with any of these covers?