As adjectives the difference between authorial and authorly
is that authorial is of, coming from, or typical of an author (especially of books) while authorly is in the manner of an author.
authorial
English
Adjective
(head)
of, coming from, or typical of an author (especially of books)
Synonyms
* autorial
* auctorial
Derived terms
* authorial intention
* authorial intentionality