Every author needs an editor.
Don't believe me? Read this
But what KIND of editing does your book manuscript need?
Well, there are at least five different types of book editing, and I'll list them below. Your manuscript may require a combination of these approaches.
I recommend hiring a professional editor for any of the first three services on this list. The last two options are good for getting your manuscript as ready as possible before either sending on to a professional editor or going straight to publishing (in the event that you can't afford to hire an editor).
The five most common forms of book manuscript editing
1. Developmental editing
A developmental editor assists the author (sometimes through multiple drafts) with elements of structure, concept, content, tone, and overall presentation. A developmental editor may also help with research, competitive market analyses, and chapter outlines. Their aim is to make the text clear, readable, engaging, and marketable. They're kind of like a coach, only without the whistle.