When Desmond Bagley died he left one book unfinished (Juggernaut) and the manuscript of another that he had written years before, and not submitted to a publisher since he felt it wasn't up to his usual standard. (Night of Error)

Both books were later published, doing his reputation absolutely no good at all, although giving his publishers some extra money. Not cancelled, but they should have been. This is where a literary executor would have been useful.