A subtitle should tell the consumer additional information that cannot be conveyed by the title alone.

You’ll want to choose one, if possible, because it gives you an additional chance to add more keywords on Amazon.

Keywords are simply the words a person would type in the search bar to identify the kind of book they are looking for.

Authors are allowed to choose ten keywords. These will come from the title, subtitle, back cover blurb, and book description you write for your Amazon sales page.

I wrote down dozens of ideas for the subtitle for my soon-to-be-released book, Justice for Jessie. I decided on Forgiving the Unforgivable because it further described my book, along with being “catchy”—at least to me. It was also short and sweet, making it more memorable. 

Remember: Your subtitle should represent the genre in which you write, mine being Christian Suspense.