"Editor" is four different jobs wearing one name — and most first-time authors hire the wrong one first. Here's what each kind of editor actually does to your manuscript, what lands in your inbox when they're done, and what no editor will do no matter what you pay.
| Editor | What they do | What you receive |
|---|---|---|
| Developmental | Reads the whole book for structure, pacing, arcs, POV and stakes | An editorial letter (often many pages) plus chapter-level notes |
| Line | Reworks prose sentence by sentence: clarity, rhythm, word choice, flow | Your manuscript with hundreds of tracked changes and margin comments |
| Copy | Corrects grammar, punctuation and consistency; enforces a style guide | Corrected manuscript plus a style sheet of every decision made |
| Proofreader | Final check of the finished file for typos and formatting errors | The last list of errors before publication |
They run in exactly that order, for reasons covered in what order edits go in. Costs for each: developmental · line · proofreading.
No legitimate editor will guarantee sales, reviews, or agent interest — anyone who does is selling something else. Editors also don't rewrite your book (that's ghostwriting, a different service with a different price), don't market it, and won't make a broken premise work — an editor can sharpen the execution of the book you wrote, not exchange it for a different one.
The same four jobs now exist as AI services at a fraction of the price and turnaround — which changes the economics, not the order. Many working indies run AI diagnostics early and often (Starport's Developmental Critique delivers the editorial letter with every note anchored to your text; the Line Edit does the line pass against a Style Sheet built from your own prose), then spend human rates where human judgment matters most — or on the final human proofread. The free Scorecard below is the zero-cost way to find out which of the four jobs your book actually needs first.
The Manuscript Scorecard grades your full manuscript on nine craft metrics, benchmarks it against professionally-edited books, and tells you exactly what to fix first. Free, in minutes.
Get your free Manuscript Scorecard →No — editors diagnose, recommend and correct; the writing stays yours. If you want someone to rewrite the book, that's ghostwriting, which is a different service and is priced accordingly.
Ask for a sample edit of your opening pages (most offer this), check they work in your genre, and read their notes for evidence — specific citations from your text, not generic advice that could apply to any manuscript.
No, and no reputable one will claim to. Editing raises the floor of your book's quality; sales depend on positioning, cover, blurb and market — different problems with different tools.
They're different tools. AI is near-instant, far cheaper, and strong at systematic diagnosis; a human brings judgment calls and taste. The common pattern: AI passes early and often, human expertise on the final draft — where it can do its best work.