Amazon keywords have always been a mystery to me. How do you pick the right ones? And what do keywords really DO anyway?
Turns out, using the right keywords can get your book listed in some of those random categories that you can't automatically select. Categories like Military Romance, or Love-Triangle Romance.
These links give you a list of the keywords that will put you those important (and helpful) categories. Just click on the category(s) that you are aiming for. NOTE: These are only for the US store.