Other forms: authorially
Use the adjective authorial for things that relate to the person who wrote a book, screenplay, or article. You give up your authorial control when you hand your short story over to an editor.
If you pen a novel, you may choose to give your authorial voice to a narrator, allowing them the power to reveal all the background information you want your readers to know. And your ultimate goal, the message you hope to convey in your book, can be described as authorial intent. Authorial is from author and its Latin root, auctor, "trustworthy writer."