We’ve already talked about developmental edits in Tip #34. I just wanted to emphasize them again. Especially if this is your first novel. Although I use a developmental editor for EVERY book.
You will also, of course, need to hire a copy editor to make sure your grammar, your punctuation, Proper Nouns, and your style are consistent throughout the book. A copy editor can also be a proof reader, if you request them to be.
Believe me, you need all three. Even if you aced your high school English class.
Btw, you can see all my Writing Lite tips thus far here on Pinterest.