How to Turn Fan Fiction into an Original Novel (Filing Off the Serial Numbers, Properly)

By Lindsay, Founder of Inkling · Updated October 2026

You wrote a fic that people loved. It has a plot you built, an original character readers ask about, and a slow burn that took you a year to get right. Now you are wondering whether it could be a novel of your own. It can, and plenty of published books started exactly this way. But the version that works is not a find-and-replace on the names. It is a rebuild: you keep what is truly yours, take out what belongs to the source, and construct a new world and new people strong enough to hold the story without the reader's memory of canon doing the work. Here is how, step by step, with a worksheet to copy.

A note before we start: this isn't legal advice. Copyright and trademark law vary by country and turn on the details of a specific manuscript. If you plan to sell a book that began as fan fiction, talk to a lawyer about your draft.

What “filing off the serial numbers” really means

Fan writers have long called it filing off the serial numbers: taking a fic and removing what ties it to its source. Done badly, it is a find-and-replace. The canon hero gets a new name, the canon city gets a new name, and everything else stays. Readers who know the source spot it within a chapter, and readers who do not are confused, because the story still leans on a world nobody has explained to them.

Done properly, it is closer to adapting your own story into a new world. You keep the parts that came from you, rebuild everything that came from the source, and end up with a book that would make sense to someone who has never heard of the original. That is a lot more work than renaming. It is also the only version that holds up.

What is yours, and what is not

Start by sorting. Read your fic and put each element in one of two piles.

Usually yours to keep:

• Your plot, where it departs from canon: the events you invented and the order you put them in.
• Your original characters, and their inner lives.
• Your prose: the sentences, the voice, the jokes.
• Your themes and the emotional shape of the relationships, what the story is really about.
• Broad ideas and tropes. The U.S. Copyright Office's FAQ on what copyright protects says copyright does not protect ideas or concepts. Enemies to lovers, a bargain with a fae prince, a forced marriage of convenience: nobody owns those.

Not yours, and needing to go:

• The world. Its geography, history, institutions, magic system and invented vocabulary.
• The canon characters' identities. Not just their names, but their histories, appearances, signature traits, families and relationships.
• Distinctive canon events. The battle, the curse, the scene everyone in the fandom can quote.
• Names and titles, of people, places and things. The same Copyright Office FAQ notes that names and titles are not protected by copyright, but some are protected as trademarks, and either way a canon name tells the reader exactly what they are reading.

Why the second pile matters: under U.S. law, the right to prepare derivative works based on a copyrighted work belongs to its owner (17 U.S.C. § 106). A novel that still rests on the source's world and characters is still, in substance, built on that work. The goal of the rebuild is a book that does not need the source at all.

Books that started as fan fiction

You are in good company. A few well-documented examples:

• Fifty Shades of Grey. According to Wikipedia, E. L. James first posted it episodically as Twilight fan fiction called Master of the Universe, then moved it to her own site, rewrote it as an original work with the leads renamed, and took it down before publication.
• Cassandra Clare. Before City of Bones came out in 2007, she wrote The Draco Trilogy, a Harry Potter fan fiction posted from about 2000 until 2006, and her Wikipedia entry notes that she carried ideas from it into The Mortal Instruments.
• Alchemised. SenLinYu's 2025 novel began as Manacled, a Harry Potter fan fiction serialized online in 2018 and 2019. Per Wikipedia, the author redrafted it from late 2022 to remove every reference to its sources, gave the leads new names, and removed the original from Archive of Our Own on January 1, 2025.

And a related path: Sarah J. Maas posted early chapters of what became Throne of Glass, then called Queen of Glass, on FictionPress, where it became one of the site's most popular stories, and took it down when she decided to publish, according to her Wikipedia entry. That one was original fiction from the start (FictionPress is FanFiction.Net's sister site for original work), but it grew up in the same online writing culture, with readers commenting chapter by chapter.

Notice what these stories share. None of them reached print as a renamed fic. The work of turning a story into its own book happened before publication.

Rebuild the world from first principles

This is the step most people underestimate. In fan fiction, the source gives you a world for free: readers already know how the magic works, what the factions want and why the old war matters. Your fic probably spends almost no words on any of it, and that is correct for a fic. For a novel, every one of those free things has to be built, and built so it belongs to your story.

Do not rename. Rebuild by function. For each element of the canon world your story uses, ask what job it does in your plot, then invent something new that does the same job in a different way.

• The magic. What does your plot need magic to do, and what does it need magic to cost? Build a system around those two answers. If it ends up working like the source's system with new words, keep going.
• The politics. Which conflicts drive your story? A rivalry, an occupation, a succession fight. Build the factions that create that conflict, with their own history.
• The geography. Which places do your scenes need, and how far apart must they be? Draw a new map from those needs instead of tracing the old one.
• The rules. What can people not do in your world, and who enforces it? Your best scenes probably came from a canon rule pressing on your characters. Find a new rule that presses the same way.

A good test: describe your world in a paragraph to someone who loves the source. If they can guess the source, you are not done. Our guides to creating a fantasy world and the worldbuilding template give you the full list of questions, and how to write romantasy covers how the world should press on the love story if that is your genre.

Rebuild the characters from the wound up

Canon characters arrive with years of history the reader already knows, which is why a fic can make you feel so much in so few words. Your rebuilt characters have to earn that from the page. Start with the role the character plays in your story and the emotional shape of their arc, which are yours, and then rebuild everything underneath:

• A new wound. What happened to them before the story starts. It should produce the same kind of behaviour your plot needs, from a different cause.
• A new lie they believe, growing from that wound.
• A new want and a new fear, so their choices in your plot have fresh reasons.
• A new history, family and appearance. Drop the signature traits readers would recognize: the scar, the catchphrase, the famous habit.
• A new voice. Write a page of them talking about something unrelated to the plot, and keep going until it sounds like nobody else.

Your original characters need less rebuilding, because their inner lives are already yours. But check their backstories: if an original character's history is tied to canon events, it has to be rewired into your new world. Our character profile template has the full set of questions.

Cut or replace the distinctive canon events

Go through your chapter list and mark every scene that depends on a canon event: a battle the fandom knows, a reveal from the source, a famous moment you rewrote from another angle. Some of those scenes will be the ones readers loved most, which is what makes this hard. For each, ask what it does for your story (raises the stakes, forces a confession, separates the couple) and write a new event, native to your world, that does the same job.

Watch the opening especially. Fics often start in the middle of canon, because readers already know the setup. An original novel has to establish who these people are, what they want and what is wrong before the story can rely on it. Expect the first act to need the most new writing.

What readers and agents notice

Readers who know the source notice recognizable scenes, dialogue patterns, a relationship dynamic that maps one to one onto a famous ship, and vocabulary that only exists in one fandom. Readers who do not know the source notice something else: gaps. A world that is described in less detail than it needs, motivations that make sense only if you know a history the book never tells, an emotional payoff that lands with no visible setup. Both are signs the source is still holding up part of the book.

Publishers are increasingly open about fanfic origins. Jenny Hamilton's 2025 essay for Reactor looks critically at how publishers now market books by their fandom roots. That openness does not change the basic test. What an agent reads is your manuscript, and it has to work for a reader who has never seen the fic. If your story was posted online in full, ask any agent or publisher you work with how they treat previously posted work, and be straightforward about its history.

Take the fic down, or leave it up?

There is no single right answer, and it is your call. Some tradeoffs to weigh:

• Taking it down reduces direct comparison between the fic and the novel, and keeps the novel feeling new. A publisher may prefer it. But you lose the comments, the kudos and the community that grew around the fic, and readers who loved it may be hurt to see it go. Both Fifty Shades and Alchemised had their fic versions taken down before the novels came out.
• Leaving it up keeps the story for the readers who found it there, and honours the community it came from. It works best when the novel is different enough that the two read as separate works.
• Either way, keep a private copy of the fic. You will want to refer to it during the rewrite.

The business side

If you self-publish on Amazon, KDP's content guidelines say it is the responsibility of authors and publishers to make sure their content does not violate laws or rights, including copyright and trademark. In other words, the platform will not check this for you, and you carry the responsibility. If you are offered a traditional deal, read what the contract says about originality and rights, and get advice before you sign. Either way, the rebuild above is what puts you on solid ground. This isn't legal advice, and a lawyer who handles publishing can look at your actual manuscript.

The other half of the business side is craft: an original novel needs a hook that does not depend on the fandom. Readers who never saw the fic need a reason to pick it up. Our guide to how to publish a book walks through the routes from here.

A copyable fic-to-original rebuild worksheet

Copy this into your notes and work through it before you start the rewrite. It is long on purpose: every line is a decision the source used to make for you.

FIC-TO-ORIGINAL REBUILD WORKSHEET

1. WHAT IS MINE (KEEP)
Plot events I invented:
Original characters:
Themes / what the story is really about:
Relationship arc (the emotional shape, in one sentence):
Scenes or lines I wrote that don't depend on canon:

2. WHAT IS NOT MINE (REBUILD OR CUT)
Canon world elements my story uses:
Canon characters in my story:
Canon events my plot depends on:
Canon names, terms and titles in the text:

3. THE WORLD, REBUILT BY FUNCTION
Element from canon | Job it does in my plot | New element that does that job
-------------------|------------------------|-------------------------------
Magic:             |                        |
Politics:          |                        |
Geography:         |                        |
Key rule:          |                        |
Test: could a fan of the source guess it from a one-paragraph description? (y/n)

4. EACH CANON CHARACTER, REBUILT FROM THE WOUND UP
Role in my story:
Emotional arc (keep):
New wound:
New lie they believe:
New want:
New fear:
New history, family, appearance:
Signature canon traits removed:
Voice sample written? (y/n)

5. CANON EVENTS
Scene | Canon event it depends on | What it does for my story | New event
------|---------------------------|---------------------------|----------

6. THE OPENING
What the fic assumed the reader knew:
What the novel now has to establish, and where:

7. DECISIONS
Keep the fic up or take it down (and why):
Private copy of the fic saved? (y/n)
Questions for an agent, publisher or lawyer:

Where Inkling fits, honestly

Inkling is a private writing desk, and it suits a rebuild because the old draft, the new draft and your notes can sit side by side. It has no fan fiction features: it does not import from AO3 or post anywhere, and it will not check your manuscript for anything borrowed. That judgment stays with you. What it does give you:

• The Character builder, for the rebuild itself. Want, wound, the lie they believe, fears, trait chips and a Notes field. Tie each rebuilt character to the novel and they appear in the Cast panel beside the page while you write. Try the demo above.
• Chapters in order, which you can number, move and name, so you can rebuild the book chapter by chapter. Titles carry into a Word export and, with Google connected, into a Google Doc with a tab per chapter.
• A private Notes pad beside every chapter, for the canon event that chapter used to depend on and the new one replacing it. Notes never go into the manuscript or exports.
• The Storyboard, for seeing the new structure: a row of scene cards for the old fic and a row for the novel, linked with arrows where a scene survives.
• The map maker, for drawing the new world from scratch. Our guide to mapping a fae realm shows how, if your story is fae.

You get 14 days to experience the full writing desk, build worlds, and be creative. No card to start. During the trial you can start 3 stories, and after that Plus is $9 a month. If your fic is still in progress, our post on organizing a long fanfic will help you keep it on track first.

Inkling is an independent writing app. A Court of Thorns and Roses and its sequels are works by Sarah J. Maas, published by Bloomsbury. Inkling is not affiliated with, endorsed by, or sponsored by Sarah J. Maas or Bloomsbury. Other books and franchises mentioned belong to their respective owners, and Inkling is not affiliated with them.