A foreword is always written by someone other than the book's author, and choosing the right person matters as much as what they actually write, since the whole point is borrowing their credibility, expertise, or reputation to help readers trust the book. If you're the author wondering how to write your own foreword, you're actually looking for a preface instead. See Foreword vs. Preface vs. Introduction.
This is part of The Parts of a Book: A Complete Front Matter Guide.
The right person has a genuine, relevant connection to your book's subject or audience, not just general fame or credentials unrelated to the content. For nonfiction, this is often an expert in the field, someone with professional standing that reassures readers the book's content is credible. For memoir, it might be someone closely connected to the events described, or a well-known figure in a relevant community. For fiction, forewords are less common, but when used, they're often written by an established author in the same genre, someone whose name signals to readers, "if you like their work, you'll likely enjoy this."
A foreword from someone with no real connection to your book's content or audience adds little value, however impressive their name might be in another context.
Make a specific, low-pressure ask, explaining why you thought of them specifically and being clear about what you're asking for, roughly how long, by when. Give them the manuscript, or at least a substantial excerpt, well in advance, since they need to actually read and engage with the book to write something genuine, and offer a draft direction rather than a script: you can share what you hope the foreword might touch on, but the foreword writer's own voice and honest perspective are what make it valuable, so don't ask them to simply endorse talking points you've written for them. Respect a "no," since not everyone you ask will have the time or interest, and a foreword from someone who genuinely wanted to write it reads differently than one written out of obligation. And give them credit clearly, both in the byline of the foreword itself and, often, on the book's cover or description if their name carries real weight for your audience.
A foreword typically opens with the writer's connection to the author or the book's subject, briefly, so readers understand why this person is the one introducing the book. From there it explains why the book matters, from the foreword writer's perspective, whether that's its content, its timing, or its author's unique voice, and it offers a genuine, specific recommendation rather than generic praise that could apply to any book. It closes with the writer's name, and often their credentials or title, signed at the end.
Like most front matter, a foreword works best when it's brief, typically a page or two at most. Its job is to add credibility and context quickly, not to summarize the entire book or restate its content in detail.
A foreword makes the most sense when a genuinely relevant, credible voice is available and willing to write one, and when that endorsement would meaningfully help your specific readers decide to trust the book. If you don't have an obvious, relevant person to ask, or if asking would feel forced, it's completely fine to skip a foreword entirely; most self-published books, and even many traditionally published ones, don't include one.
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No, by definition. A foreword is always written by someone other than the author. If you want to speak to readers directly about your book, that's a preface instead.
Someone with a genuine, relevant connection to your book's subject or audience, not just general fame. Their credibility with your specific readers matters more than their credentials in general.
Typically a page or two. Its job is to add context and credibility quickly, not to summarize the book in detail.
Not necessarily. Most books, including many traditionally published ones, don't include one. It's most useful when a genuinely relevant, credible person is willing to write one.