Writers often don't recognize their own embedded themes until after writing "the end"--and sometimes not even then. True revelations are often handed to us by reviewers, book clubs, and Goodreads. Only by looking back do we recognize our sore spots and consistent curiosity.
As an author of psychological suspense thrillers, I've been invited to several book clubs to talk about my novels. It's a very engaging kind of contact with readers and is unlike speaking at libraries, being on a panel of authors or talking to members of an organization.