There are many databases in the A-Z list that start with Gale (a vendor), and many that have the word "Literature" in them. It's confusing, even for librarians!
All are good, but for your search please focus mostly on Gale Literature Resource Center.
Others that might be helpful are listed below:
The Gale Literature Resource Center is smaller in scope and tends to have primarily biographies and articles about established authors in the canon. So while you will find many historic authors in there, not many living authors are indexed in there yet.
For example, despite having won multiple Hugo Awards, and being well known in the science fiction world, NK Jemison is still actively publishing and has not yet been added into the Gale Literature Resource Center.