How many rewrites of their Book should an Author do?

2 to 4 rewrites is the ideal number At that point you will hit the wall of diminishing returns, and should hand it over to a good professional editor Note: Depending on your book category/genre, you might want to do 1 or 2 more rewrites (i.e. a total of 3 to 6 rewrites) BEFORE handing it over to your editor. Certain genres like Historical Fiction have very little tolerance for errors (especially...