Of, coming from, or typical of an author (especially of books)(adjective)
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Use "authorial" in a sentence
"And that is what you seem to mean by the term authorial intention."
"I'm a bit surprised by how interested in authorial intentionality people are; I posted "Intentionally Omitted" primarily to clarify what Drout, Hodges and I were dancing around for the One Ringers."
"The only way wherein authorial (privileged) intent can be kept is if the author is also the illustrator or artist, otherwise, there will always be a duel of visions."