what is the salary for an author exactly?

Question

it is for h.w

Answer 1

There is no set salary. Authors make money based on the royalties of the book they sell. Sometimes they are given an advance when they sign a contract, but that money comes out of future sales.

If an author's book hits it big he make make 100's of thousands of dollars from a book.

If an author's book takes a dive he will make nothing.

Answer 2

zero..none.
earn by selling written material