The three words get swapped constantly, in books, on store pages and in publishing contracts. They mean different things, and the difference decides who writes the page and where it goes.
What is the difference between a foreword, a preface and an introduction?
The quickest test is who wrote it and what it is about. A foreword is about the author or the book, written by someone else. A preface is about the book, written by the author. An introduction is about the subject, written by the author, and is the start of the book proper.
| Foreword | Preface | Introduction | |
|---|---|---|---|
| Written by | Someone else | The author | The author |
| About | The author, the book or its importance | How and why the book was written | The subject itself |
| Purpose | Credibility | Context | Preparation for chapter one |
| Signed? | Yes, with name and often date | Often, with initials or name | No |
| Part of the main text? | No, front matter | No, front matter | Yes, usually |
| Can the reader skip it? | Yes | Yes | Not without losing something |
| Common in | Non-fiction, anthologies, reissues | Academic, technical, new editions | Non-fiction of every kind |
The skip test is the most useful one in practice. If a reader could skip the pages and lose nothing they need for chapter one, it is a preface. If skipping them would leave chapter one confusing, it is an introduction.
What is a foreword?
A foreword is a short piece by a person other than the author, placed before the main text. Its job is to lend credibility: someone the reader already trusts says why this book and this author are worth their time.
The writer is usually a known figure in the field, a mentor of the author, or someone who appears in the book. It is signed with their name, and often with a place and date. A foreword runs anywhere from a page to a few pages, and it can be read on its own.
Spelling catches people out. It is foreword, a word that comes before. "Forward" on a book cover is a common and very visible mistake.
What is a preface?
A preface is written by the author and talks about the book rather than its subject: why it exists, how the research was done, what it covers and what it leaves out, and sometimes who helped. It is often signed with the author's name or initials.
Prefaces are most common in academic, technical and reference books, where the reader benefits from knowing the scope and method before starting. They are also the traditional place to explain what changed in a new edition: a "preface to the second edition" sits before the original preface and tells returning readers what is new.
If the preface is mostly thanks, it is really acknowledgements, and it can move to the back.
What is an introduction?
An introduction is the author's opening to the subject. It sets out the question the book answers, gives the reader the background they need, and often maps the chapters ahead. It is part of the book's content, and in most layouts it is treated as the first section of the main text rather than as front matter.
Most non-fiction books benefit from one. A how-to book uses it to tell the reader what they will be able to do by the end. An argument-led book uses it to state the argument. Fiction rarely has one; a novel that needs explaining before it starts usually needs a different chapter one instead.
Where does each one go in the book?
In a printed book the order is fixed by convention. After the half title, title page, copyright page, dedication, epigraph and contents come the foreword, then the preface, then any acknowledgements placed at the front, then the introduction, then chapter one. Front matter and back matter lists the full sequence.
| Order | Page | Numbering in traditional print |
|---|---|---|
| 1 | Contents | Roman numerals |
| 2 | Foreword | Roman numerals |
| 3 | Preface | Roman numerals |
| 4 | Acknowledgements, if at the front | Roman numerals |
| 5 | Introduction | Arabic, usually starting at 1 |
| 6 | Chapter one | Arabic |
The roman and arabic split is the traditional treatment, and plenty of self-published books skip it. Page numbers in a Markdown PDF explains why starting at 1 on the first page of body text is enough for most books.
Which one does your book need?
Answer three questions in order.
- Does someone the reader trusts want to vouch for the book? If yes, a foreword. If you would have to chase a stranger for one, skip it.
- Does the reader need to know how or why the book was made? A changed edition, an unusual method, a translation. If yes, a short preface.
- Does chapter one need setting up? If the reader needs background, a question or a map of the book first, write an introduction.
Most books end up with one of the three, usually the introduction. A book with all three spends several pages before it starts, and every page of preamble is a page where a reader can put it down.
How do you write each one well?
A foreword, if you are asked to write one: say who you are in relation to the author or subject, say why the book matters, and stop well before the author's own introduction begins. Keep it to a few pages at most.
A preface: state why the book exists, what it covers and what it does not, and anything about method a careful reader would want. Leave out anything that is really content.
An introduction: open with the question the book answers, give only the background chapter one depends on, and tell the reader what the chapters will do. How to outline a book helps here, because an introduction is easier to write once the structure is settled. For a non-fiction proposal, the introduction often becomes the sample chapter, which is why how to write a book proposal treats it as a selling document.
How do you mark them up in Markdown?
Each one is a section with a heading at the same level as a chapter, so it appears in the table of contents and the EPUB's navigation. A page break before each keeps them on fresh pages.
---
## Foreword
*by Dana Okafor*
---
## Preface
---
## Introduction
---
## 1. The First ChapterUse the same heading level for all of them, so the structure stays flat and predictable. Headings in Markdown explains why skipping levels confuses every tool that builds navigation from them.
Building the front of the book in bukpress
In bukpress the front matter is part of the same Markdown file as the chapters. Each --- line on its own is a hard page break, so the foreword, preface and introduction each start on a new page, and each heading takes your title typeface while the text uses the body settings set once for the whole book. There is no roman and arabic split; page numbers are one footer setting, on or off. Export the typeset PDF, and on Pro a reflowable EPUB from the same file, where these sections become entries in the reader's navigation menu. The sample book shows a real export's front pages.
Common questions
Can the author write the foreword?
Not under that name. A foreword written by the author is a preface. If you want to explain the book yourself, call it a preface or an introduction, and readers will know what to expect.
Is a prologue the same as an introduction?
No. A prologue belongs to fiction and is part of the story, often a scene set at another time. An introduction belongs to non-fiction and talks to the reader directly about the subject.
How long should a preface be?
Usually one to three pages. A preface that runs longer is often carrying material that belongs in the introduction or in a chapter.
Does a self-published book need a foreword?
No. A foreword helps only when the person writing it means something to your readers. A foreword from someone they have never heard of adds pages without adding trust.