There are different kinds of editors. There are those that work for publishing houses and shepherd books through the process (if you get selected by them). Then there are those that actually work with authors to improve their books. I am one of the latter and would love to work with you on your next/current book.
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Earlier this year it became clear that Harper Lee had extensively revised To Kill a Mockingbird on the advice of her editor. That made us wonder: How much do editors shape the books we read?
Source: What Exactly Does An Editor Do? The Role Has Changed Over Time : NPR