Book Prologue Definition and How to Write One

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Prologues in books can be both tricky and controversial. You may be wondering how to write a prologue—or if you should.

They can be a great tool for hooking readers or setting up a conflict, but many readers admit to skipping prologues.

Today’s post will cover the meaning and purpose of a book prologue, how to know if you need one, book prologue length, and tips on how to write a prologue for your book that will engage your readers. We’ll also discuss some ideas and examples of book prologues.

What is a book prologue? What is the purpose of a prologue?

A prologue is a section of the story that comes before the first chapter.

I like to think of it primarily as a hook to get readers to keep reading. It can set the story’s stakes and tone, introduce characters that don’t come into the story until later (like the bad guy), foreshadow something to come, or provide background information on the story’s conflict.

That said, prologues are not for info dumping. They should not read like an encyclopedia entry. I don’t blame readers for skipping prologues like that.

Is a prologue necessary?

No, prologues aren’t always necessary. There are a few questions you should ask yourself if you’re considering including one.

The first question to ask yourself when writing a prologue is could this be the first chapter? If the answer is yes, make it the first chapter. You don’t need to complicate it more than that.

Similarly, ask yourself, if the reader skipped this, would they miss essential events or information? Would they be confused later in the story? If the answer is no, you don’t need the prologue.

The next thing you should consider is the genre. Thriller, mystery, suspense, historical fiction, and fantasy commonly have prologues, and people who read those genres won’t be surprised when they open up to a prologue.

If you’re writing in another genre, your readers are less likely to be tolerant of a prologue. This doesn’t mean you can’t have one, but you should consider whether you can include what’s in the prologue in the story in another way.

How long should a book prologue be?

Keep it short.

If you want readers to skip your prologue, the best thing you can do is write a lengthy one.

However, when it comes to a prologue’s length, there’s no rule for how long it can be. But it’s best to keep it brief and snappy if you can. Some people suggest keeping it under the length of an average chapter.

To know if your prologue is too long, you can ask your beta readers or editor if at any point while reading the prologue they lost interest or wanted to skip to the first chapter. If they did, you may want to make your prologue shorter.

Truthfully, you can make it as long as you want—provided that it holds the reader’s attention.

Book Prologue Examples and Ideas

If you don’t already have an idea for your prologue, you probably don’t need one. But if you want to experiment with writing a prologue anyway, here are some ideas based on examples of prologues from well-known books.

A Key Event

Many books feature a key event that takes place before the story starts. This event is usually why the characters are where they are at the beginning of the story.

Sanderson has put a unique twist on the prologue though. Each book in the series shows the same day but from the perspective of a different character, so readers learn a bit more about what happened that fateful day with each book.

The Arrival of Something Important

Often prologues show the arrival of something that will set the story in motion.

An In-World Document

Some novels revolve around something that’s been documented, so instead of explaining whatever it is, authors just give readers the document.

This prologue hooks readers because they want to know what unwinding has done to the world.


I hope this guide has helped you learn what a book prologue is and how to write one. Happy writing!

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Hi! I’m Lexi, an editor and writer with a passion for stories. I love helping authors make their books better and writing my own books. On this blog, you’ll find writing advice and discussions on stories of all kinds.

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