Hi @SHAGUARTheNightHuntress! You can search on Pinterest for things like "authors" or even get more specific - like "Indie authors" or "paranormal romance authors."
As a marketer and creator on Pinterest, you may want to first focus on creating your own content about writing, books, etc - whatever your content strategy includes. That's truly the main point of Pinterest marketing - to create pins that help and inspire your ideal audience, and bring them closer to buying (or whatever next steps you want them to take, based on your strategy for monetizing.)
I hope these ideas help! I'm happy to help more - tag me with any specific questions!