(Specific tips on improving the current design welcome, most stores allow edits)
It's just job conditioning... At some point in my life I was playing the game of trying to recognize the fonts I was looking at in the adds and signs as I walking down the street.
I would say that your choice of cover design as a whole denotes elegance and taste. Look at the cover design of graphic designer Manuel Estrada:
https://estradadesign.eu/project/alianza-editorial/
Your cover remind me of that kind of style.
There are some details about the typeface, layout, and the photograph that, as somebody with a certain background in graphic design, I can perceive as a little bit off.
The image on the site has incorrect capitalization ("A History of..."), though the one on Amazon appears to be corrected.