What Is a Style Sheet and Why Does Your Editor Use One?

An editorial style sheet is a short, project-specific document your copy editor creates while editing your manuscript. It records every significant stylistic decision made for your book: how names are spelled, whether you use the Oxford comma, how numbers are treated, and dozens of other choices that keep your text internally consistent from first page to last.

What Does a Style Sheet Actually Contain?

A style sheet documents the specific editorial choices that apply to your manuscript and no one else’s. It typically runs one to three pages and covers the decisions your editor made when the dictionary or a style guide offered more than one correct option.

The core sections of most editorial style sheets include: punctuation preferences (Oxford comma usage, em dash or en dash, ellipsis treatment); capitalisation rules (especially for terms that could go either way, like “internet” or “the church”); number and numeral treatment (spelling out numbers below ten, or below one hundred, or some other threshold); hyphenation decisions (is it “self-published” or “self published”?); spelling preferences (American or British English, and individual word choices like “okay” versus “OK”); and typography notes (what gets italicised, what stays in roman type).

Every style sheet also includes a word list. This is an alphabetised record of proper nouns, unusual terms, and any word whose spelling or treatment required a decision. If your novel features a character named Caelynn (not Kaelyn, not Cailynn), that goes in the word list. If your nonfiction book uses “health care” as two words rather than “healthcare,” that goes in as well. The word list is the section the proofreader will refer to most, because it settles questions of consistency at a glance.

The Chartered Institute of Editing and Proofreading (CIEP) recommends that all style sheets also include information about how spelling, punctuation, and grammar are used in the manuscript, with a separate word list for variant spellings. At ebookpbook, when we receive a manuscript that has already been professionally copy edited, the accompanying style sheet is what tells us whether a seemingly unusual spelling was an intentional authorial choice or an error the editor missed.

What Is the Difference Between a Style Sheet and a Style Guide?

A style guide is a comprehensive, pre-existing set of universal rules for grammar, punctuation, and formatting. The Chicago Manual of Style (CMOS), now in its 18th edition (released September 2024), is the standard reference for American English book publishing. It runs over a thousand pages and covers everything from comma usage to citation formats. The AP Stylebook serves the same function for journalism; APA style does so for the social sciences.

A style sheet, by contrast, is short, specific to one manuscript, and created during the editing process. It records the decisions your editor made for your particular book, including any intentional deviations from the broader style guide. The key timing difference: a style guide exists before the editor starts work; a style sheet is built while the editor is actively reading your manuscript. Think of the style guide as the general rulebook for all books, and the style sheet as the specific rulebook for yours.

CMOS 18 introduced several notable updates that affect indie authors, including formal recognition of the singular “they,” new guidance on AI-generated content and copyright, and updated rules for apostrophes with plural capital letters. Your editor’s style sheet will note which edition of CMOS (or which alternative guide) served as the baseline, so anyone working on the manuscript later knows which set of rules applies.

Should You Create a Style Sheet Before Sending Your Manuscript to an Editor?

Yes. A preliminary style sheet communicates your known preferences so the editor can align their work with your intent from the start. Without one, the editor has to guess which of your unconventional choices were intentional and which were oversights.

Your preliminary style sheet does not need to be exhaustive. Focus on the decisions you have already made deliberately: your preferred spelling variant (American or British English), whether you use the Oxford comma, how you handle dashes, your capitalisation choices for terms that could go either way, and your number treatment preference. For fiction, include a character list with correct name spellings, a note on point of view and tense, and any invented words or worldbuilding terminology. For nonfiction, list any specialised terms, abbreviations, or acronyms that appear throughout the manuscript.

Even a half-page preliminary style sheet saves time and money. It reduces the number of queries your editor needs to raise, prevents misunderstandings about intentional choices, and signals that you have thought carefully about your manuscript’s internal logic. As one professional editor puts it, receiving a style sheet from an author is “extremely helpful” because it eliminates guesswork about why something was formatted or spelled a particular way.

A practical pattern we see at ebookpbook: authors who provide a preliminary style sheet to their copy editor tend to receive fewer rounds of queries, and the final manuscript arrives at the formatting stage with noticeably fewer inconsistencies to resolve. The style sheet essentially front-loads the communication that would otherwise happen through scattered comments and emails.

How Does a Fiction Style Sheet Differ from a Nonfiction One?

Both fiction and nonfiction style sheets share the same core sections: punctuation, capitalisation, number treatment, hyphenation, and a word list. The differences lie in the additional sections each type requires.

Fiction style sheets must include detailed character lists. For each character, the editor records name spelling, physical traits (hair colour, eye colour, approximate age), key relationships, and backstory details that must remain consistent across the manuscript. A character who has brown eyes in chapter three cannot have blue eyes in chapter twenty without explanation. The CIEP recommends recording entries in a format like: “Skye (age 14 at end of Book 1, born May 2009). Appearance: short dark brown hair, 5 foot 4, scar over right eye, brown eyes.” This level of detail catches mid-novel continuity errors that even careful authors miss.

Fiction style sheets also require a chronological timeline (especially important for non-linear narratives, multiple points of view, or stories that span years) and worldbuilding notes for fantasy, science fiction, and historical fiction. Invented words, place names, fictional rules, and unconventional capitalisation conventions all need documenting. If your fantasy novel capitalises “the Sight” as a proper noun but leaves “the darkness” lowercase, that distinction belongs in the style sheet.

Nonfiction style sheets, by contrast, focus on terminology consistency, abbreviation conventions, and citation treatment. A book about medical topics needs every drug name, condition, and procedure spelled and capitalised identically throughout. A history book needs consistent date formats and naming conventions for historical figures. The Copyeditor’s Handbook by Amy Einsohn and Marilyn Schwartz (the standard professional reference for copy editors, now in its 4th edition from University of California Press) explicitly addresses how style sheet requirements differ by genre and subject matter.

How Do You Use the Style Sheet Your Editor Returns?

When your copy editor returns your edited manuscript, the style sheet should accompany it as a separate document. Treat it as your master reference for every stage that follows.

During proofreading, the style sheet is the definitive authority on correct spellings, character names, locations, and punctuation rules. If you are reviewing track changes from your editor, the style sheet explains the reasoning behind systematic changes. Your editor changed every instance of “OK” to “okay” not on a whim but because the style sheet locked that decision early in the process.

If you hire a separate proofreader (which is recommended; the person who copy edits should not also proofread), send them the style sheet. This prevents the proofreader from second-guessing or reversing decisions the copy editor already made. Without the style sheet, a new proofreader would have to reconstruct every decision from scratch, wasting time and risking inconsistency.

The style sheet also serves as a self-education tool. Review it carefully and you will learn about your own writing habits. If the word list contains a dozen entries where your editor standardised variant spellings, that tells you where your consistency tends to slip. If the copy editing uncovered that you alternate between two different capitalisation conventions for the same term, that is a pattern to watch for in future manuscripts.

When your manuscript reaches the formatting stage, the style sheet is equally important. Formatters working in InDesign, for example, rely on the style sheet to verify that the paragraph and character styles they apply match the editorial decisions already made. A style sheet that specifies British spelling conventions tells the formatter not to flag “colour” or “realise” as errors when running spell checks against the typeset pages.

Why Is a Style Sheet Essential for a Book Series?

For authors writing a series, a style sheet is not optional; it is essential infrastructure. Months or years may pass between volumes. Different editors may work on different books. Readers will notice continuity errors: a character’s eye colour changing between books, a location’s name spelled differently, an invented term used inconsistently.

Editor Carolyn Haley, writing on An American Editor, calls building a comprehensive style sheet “the most important part of editing a series.” The series style sheet should be expanded from the first book’s style sheet and updated with each new volume. It tracks all character names and evolving relationships, all location names and descriptions, all invented words and terminology, chronological timelines, and any series-specific stylistic conventions.

The practical value is enormous. When a new editor picks up book three in your series, they can consult the style sheet to see that the protagonist’s mother’s name is spelled “Eimear” (not “Eimer”), that the fictional city of Vael-Kirin uses a hyphen, and that all chapters in the series open with an epigraph in italics. Without this document, the editor would need to re-read the earlier books or rely on the author’s memory, and both approaches are unreliable.

At ebookpbook, we format books for series authors who work with multiple editors over several years. The ones who maintain a running style sheet across volumes consistently produce cleaner, faster formatting projects. The ones without a style sheet tend to have small inconsistencies that surface during typesetting: a character’s name gains an accent mark in book two that it did not have in book one, or a fictional unit of currency changes spelling between volumes. These are fixable, but they add time and cost that a style sheet would have prevented.

Frequently Asked Questions

What happens if my copy editor does not provide a style sheet?

The absence of a style sheet is a red flag. Professional editors consider style sheets essential to the copy editing process. An editor who does not produce one may be cutting corners or may not be following standard editing practices. If your editor does not provide a style sheet, request one explicitly. If they cannot supply one, create your own from the edited manuscript by systematically noting all proper nouns, spelling choices, capitalisation rules, number treatments, and hyphenation decisions.

How specific should a fiction style sheet be about character details?

As specific as the manuscript requires for internal consistency. At minimum, record each character’s full name spelling, approximate age, key physical traits (hair colour, eye colour, distinguishing features), and significant relationships. For fantasy or science fiction, add any special abilities, titles, or affiliations. The goal is to catch the moment when a character described as left-handed in chapter four uses their right hand to draw a sword in chapter twelve.

Do I need to follow The Chicago Manual of Style for my self-published book?

CMOS is the default standard for American English book publishing and the reference most professional copy editors use. Readers conditioned by traditionally published books expect its conventions, so significant deviations can make a book appear unprofessional. That said, CMOS is a guide, not a law. You may deviate from it intentionally; those deviations are precisely what get documented in your style sheet. If you are publishing in British English, the New Oxford Style Manual is the equivalent reference.

Can I use a style sheet template instead of creating one from scratch?

Yes. Several professional editing organisations offer style sheet templates that provide a ready-made structure. The CIEP publishes guidance on fiction style sheets with recommended categories. The Chicago Manual of Style Online includes a feature for creating custom style sheets within the platform. Starting from a template ensures you do not overlook standard categories (punctuation, capitalisation, numbers, word list) and gives you a framework to fill in with your manuscript’s specific decisions.

Should I update my style sheet if I revise my book after publication?

Yes. Any revision that changes character names, introduces new terminology, adjusts spelling conventions, or modifies factual content should be reflected in the style sheet. If you later produce a second edition or a new book in the same series, the updated style sheet ensures the revision history is preserved and the next editor or proofreader can see what changed and why.