It doesn't have to be.
Mark Twain wrote an autobiography with the stipulation that it not be published until 100 years after his death. The first volume was released in 2010, exactly as Twain had requested.
Agatha Christie was working on her autobiography at the time of her death in 1976. The book was titled "An Autobiography" and was published posthumously in 1977.
Posthumous Book- A book published after the authour's death.
The author is E.B White.
The Way to Wealth was written by Benjamin Franklin as an autobiography. He began writing in 1771, but was published after his death.
Virginia Woolf wrote a series of autobiographical memories. They were published after her death in the book Moments of Being.
Death in the City was written by Francis A. Schaeffer.
DIAGNOSIS DEATH by Mabry - published April 2011
"A New Lease of Death" is a crime novel written by British author Ruth Rendell. It was first published in 1967.
"Sleeping Murder" was published after Christie's death.
Any person who writes for publication. For example, you are the author of this question. Author can also be used in the sense of a person originating, causing or creating something, as in, he was the author of this problem.
The last novel which Agatha Christie wrote was Postern of Fate, a Tommy and Tuppence story, published in 1973.She had written the last Poirot story, Curtain, and the last Miss Marple story, Sleeping Murder during World War 2, with the intention of being published after the author's death.Curtain was published in 1975, and Sleeping Murder in 1976.Agatha Christie died on 12th January 1976.Read more: What_was_Agatha_Christie's_last_novel