If you, like me, have been having trouble categorizing your book in order to get better visibility for sells, this link might help.  I was using random keywords related to highlights of my book, but not coming up well in searches.

KEYWORDS

I had enormous difficulty in getting the correct keywords through KDP for visibility until I ran across this rather obscure piece on KDP’s site.  I was using all the wrong keywords.  The keywords that I was using were all related to my book, but they were NOT the specifically programed words and phrases that Amazon uses.  I was barely able to find my book in search results until I ran across this page.  Now, I have sold more books in the past two weeks than I had in the past two months, just by getting these correct keywords into place.

It seems that Amazon has specific keywords programmed