May “author” be a verb?
Please read the Usage Note there.
Avoid using author or co-author as a verb where write or co-write will serve.
-- Oxford Style Manual
Author; co-author: Use both words as nouns only, not as verbs.
-- The New York Times Manual of Style and Usage
Look at this:
still in http://dictionary.reference.com/browse/author
5.to write; be the author of: He authored a history of the Civil War.
6.to originate; create a design for: She authored a new system for teaching chemistry.
Dictionaries are only descriptive, not prescriptive.