Editing is spoken of as one activity and is in fact four or five distinct processes performed by different people at different stages.
Developmental editing
Structure, pacing, character, argument and whether the book works as a whole.
Which is where the largest changes happen.
An editor at this stage may recommend restructuring, cutting substantial material or rewriting sections entirely.
Line editing
Sentence-level work on clarity, rhythm and voice.
Which is distinct from correcting errors.
A good line edit makes prose read as the author intended rather than making it correct.
Copyediting
Grammar, consistency, style adherence and factual checking.
Which includes maintaining a style sheet recording decisions.
Copyeditors catch continuity errors that authors and developmental editors miss entirely.
Proofreading
The final check against typeset pages.
Which catches typesetting errors as well as remaining textual ones.
It happens after layout and is the last stage before printing.
The author's role
Reviewing and accepting or rejecting suggested changes.
Which is a genuine collaboration rather than a submission.
Editors query rather than impose, and the author retains the final say in most arrangements.
Sensitivity reading
Review by readers with relevant lived experience.
Which has become common for material outside an author's direct experience.
It is advisory and is one input among several.
Fact checking
More common in magazine publishing than in books.
Which surprises readers who assume non-fiction is verified.
Responsibility generally rests with the author under most publishing contracts.
Why it matters
Skipping developmental editing is the single most consequential omission, because no amount of later polish addresses a structural problem.
The style sheet
A document recording every decision about spelling, capitalisation, names and formatting.
Which travels with the manuscript and ensures consistency.
It also captures deliberate departures from house style so they are not corrected later.
Queries
Editors raise questions rather than making silent changes to substantive matters.
Which preserves the author's decisions.
A well-queried manuscript is more useful than a heavily corrected one.
Freelance versus in-house
Most copyediting and proofreading is now freelance.
Which is a substantial professional sector with its own associations and rates.
Developmental editing is more often in-house at trade publishers.
Timeline
Editing stages run over months and are scheduled against a publication date.
Which means late delivery compresses everything downstream.
Publication dates are difficult to move once catalogues have gone out.
For independent authors
Professional associations maintain directories of editors with specialisms and rates.
What editors actually do to a manuscript
A developmental letter of several thousand words setting out structural observations.
Which is followed by a revision from the author and, frequently, a second round.
The letter is a reading rather than a set of instructions, and the author decides what to act on.
Common structural problems
Slow openings, unclear stakes, unresolved subplots and inconsistent point of view in fiction.
Unfocused argument, unsupported claims and poor organisation in non-fiction.
These recur across manuscripts and are what developmental editing exists to catch.
Cost
Freelance editorial rates vary substantially by stage and by experience.
Which professional associations publish guidance on.
Developmental editing is the most expensive stage and the one with the largest effect.
Working with an editor
Sample edits establish whether the working relationship will function.
Which reputable editors offer before committing to a full project.
Why editing is invisible when it works
A well-edited book reads as though it arrived that way, which means the labour leaves no trace.
That is precisely why it is the first thing cut under budget pressure and the omission that shows most in the finished result.
The one thing worth paying for
Developmental editing, because structure cannot be fixed later by polish, proofreading or marketing.
Editing in translation
An editor working with a translation frequently cannot read the source.
Which requires a distinct working method built on queries and trust.
Bilingual editorial support is used where the stakes justify it.
Non-fiction verification
Legal review for defamation and privacy risk in memoir and journalism.
Which is a separate process from editing.
It can require substantial changes late in production.
Where to find editors
Professional associations maintain searchable directories with specialisms, experience and rates.
Editing as collaboration
The best editorial relationships run across many books and decades.
Which is why authors follow editors between publishers where they can.
Acknowledgements pages record these relationships and are worth reading.
A closing observation
Almost every book you have admired was substantially different before an editor read it, and you will never know how. That invisibility is the job working correctly, and it is why the function is so easy to underestimate and so damaging to skip.
Self-editing
Distance from a manuscript before revising, reading aloud and structural passes.
Which improves a manuscript before any professional sees it.
It does not substitute for an outside reader, because authors cannot see their own assumptions.
Beta readers
Non-professional readers giving feedback before editing.
Which identifies problems cheaply.