What your book is actually about

Knowing what your book is about is a positioning decision, not a passion inventory

Almost every guide on this topic sends you inward: find the overlap of what you are passionate about, what you know better than most, and what a market wants. Pick the topic in the middle. For a business book, that advice quietly skips the one question that matters, and it is the reason a lot of finished manuscripts never change a single sale.

Matthew Diakonov, Written with AI

Published May 16, 20267 min read

Short answer (verified May 16, 2026)

Knowing what your business book is about means you can say, in one sentence, which client conversation the book is built to change. It is a positioning decision, not a passion inventory.

If your answer is a subject heading (“retirement planning,” “estate law,” “my 25 years in the business”), you have a topic, and you do not know yet. If your answer names a specific prospect, a specific objection the book removes, and a specific meeting that gets easier afterward, you do. Everything else on this page is how to get from the first answer to the second.

The question you think you are answering

Search this topic and the answers converge fast. Write down three things you know about. Pick the one you could live with for a year. Find the sweet spot of passion, skill, and demand. Run a self-test. Ask your followers whether it sounds interesting. It is reasonable advice for a memoir or a trade nonfiction book you hope strangers will buy.

It is the wrong starting point for a business book, because a business book is not sold on the shelf. It is handed to a prospect, mailed before a first meeting, left behind after one. Its job is to change what one person believes before they decide whether to work with you. So the question is not really about you at all.

What the question is, and what authors assume it is

Knowing what your book is about is a discovery about you. Find the topic where your passion, your expertise, and market interest overlap. Pick it. That is your book.

Starts and ends with the author
Produces a subject, not a job the book has to do
No test for whether the book will ever move a client

The one-sentence test

Here is a test you can run in under a minute. Finish this sentence out loud, without using the word “about,” and without reaching for a subject heading:

“When a prospect in [a specific situation] finishes this book, they stop believing [a specific objection], and they walk into our next meeting ready to [a specific action].”

If you can finish it with concrete answers, you know what your book is about. If you find yourself filling the blanks with categories instead of a person and a meeting, you have a topic and not yet a book. That gap is normal. It is also the entire point of doing discovery before anyone starts writing.

A worked example. An estate-planning attorney does not write a book “about estate planning.” They write the book that takes a 58-year-old who just inherited a brokerage account, who quietly suspects every advisor is a salesperson, and moves them from “I will think about it” to walking into the second meeting with their questions already written down. That is a book you can outline, write, and put in front of buyers. “Estate planning” is not.

The one-sentence test

Can you finish this sentence about your book?

Not: everything I have learned in 25 years

Not: my story, my framework, my philosophy

Yes: it changes what a skeptical prospect believes

Yes: the next meeting starts further along

If you cannot name the meeting, you do not know yet

0:00 / 0:05

Two ways to answer it

The introspection method and the positioning method are not equally useful for a business author. They start in different places and leave different risks open.

Feature	The introspection method	The positioning method
Where the answer comes from	Solo brainstorming: your passions, your skills, what a market might find interesting	The client conversation you need the book to change
What you start with	A topic you find interesting enough to live with for a year	A specific prospect, a specific objection, a specific meeting
How you test the idea	Ask your social followers whether it sounds interesting	Name the meeting it shortens. If you cannot name one, it is not ready
The risk it leaves open	A book that is interesting but never moves a sale	A book scoped to one job, shipped with a plan to put it in front of buyers
Who carries the work	You, alone, on a blank page, before anyone is hired	A Message Development Specialist, as the first milestone of the engagement

Introspection is not useless. Your passion and your expertise still feed the book; without them there is nothing to say. The point is that they are inputs, not the deciding question. The deciding question is which meeting the book has to change.

The everything book, and why it is the wrong answer

When a business owner with real depth sits down to decide what their book is about, the honest pull is to make it about everything they know. Two decades of judgment, the framework, the war stories, the philosophy. It feels generous. It feels like the safe choice, because nothing important gets left out.

From the reader’s side of the desk it is the opposite of safe. A book that is about everything you know is, to the person holding it, about nothing in particular. They cannot tell who it is for or what it will change for them in the next month, so it goes on the pile and does not get read. The book never reaches the meeting it was supposed to help.

Knowing what your book is about is mostly a discipline of subtraction. You are not deciding what to include. You are deciding what one reader, in one situation, needs to believe differently, and then keeping only the material that moves them there. The rest is not wasted. It is the next book, a talk, a chapter you cut on purpose.

How this gets decided when you are not doing it alone

Here is the part the common advice gets backward. It treats knowing what your book is about as solo homework you finish before you are allowed to start. At Paperback Expert it is the first milestone of the engagement, not a prerequisite for it.

The published process runs across 12 milestones. The first one is Brand Strategy Questionnaire and Book Blueprint Discovery: a structured questionnaire plus a discovery session that map your business, your audience, and your goals into a written Book Blueprint. There is a named role on the team for it, the Message Development Specialist, and the role exists to clarify your core message and unique positioning before a single word is written. You do not arrive with the answer. You arrive with your business, and the discovery process converts it into a defined book.

Where the decision sits in the process

Milestone 01: Brand Strategy Questionnaire and Book Blueprint Discovery

A structured questionnaire plus a discovery session map your business, your audience, and your goals into a written Book Blueprint. This is the step where what your book is about gets decided, on paper, before anything is drafted.

The Message Development Specialist owns this milestone. The role exists to clarify your core message and unique positioning before a single word is written. You are not asked to arrive with the answer. You are asked questions until the answer is obvious.

Milestone 02: Writer Matching Based On Expertise Alignment

Only after the Blueprint exists are you paired with a writer who knows your industry. The match is made against a defined book, not a vague topic.

Milestone 03: Collaborative Outline Development

The outline is built on top of the Blueprint across several meetings. Every chapter has to earn its place against the one job the book was scoped to do.

The sequence matters. Writer matching is milestone 02, and outline development is milestone 03. Both build on the Blueprint. That is why nailing what the book is about first is not a nicety: it is the thing every later milestone, including the marketing plan, is measured against. Paperback Expert has run this process across 275 books since 2013 with an in-house team of 29, and milestone 01 is where book number 276 starts.

Not sure what your book is actually about yet?

Book a 30-minute intro call with Michael DeLon. The call works through the one-sentence test for your business, so you leave knowing the meeting your book needs to change.

Questions authors ask before they start

Frequently asked questions

What does knowing what your book is about actually mean for a business book?

It means you can state, in one sentence, which client conversation the book is built to change. A business book is a client-acquisition asset, so the real question is not what subject the book covers. It is what the book does. If your answer is a subject ('retirement planning,' 'estate law,' 'my 25 years in the business'), you have a topic, not a book. If your answer names a specific prospect, a specific belief of theirs the book moves, and a specific meeting that gets easier afterward, you know what your book is about.

How is this different from picking a book topic?

A topic is what the book is filed under. The thing your book is about is the job it does for a reader in a particular situation. Most guides online collapse the two: they tell you to find the overlap of your passion, your expertise, and market demand, then pick the topic in the middle. That produces a subject. It does not tell you which prospect changes their mind, or which first meeting stops starting from zero. For a business author, the topic is downstream of the positioning decision, not a substitute for it.

What is the one-sentence test for knowing what your book is about?

Finish this sentence without using the word 'about': 'When a prospect in [a specific situation] finishes this book, they stop believing [a specific objection] and they walk into our next meeting ready to [a specific action].' If you can finish it with concrete answers, you know what your book is about. If you reach for a subject heading instead of a person and a meeting, you do not know yet. The test is deliberately strict because a book that passes it can be outlined, written, and marketed toward one outcome.

What if I want my book to cover everything I know?

That is the most common wrong answer, and it is worth naming. A book that is about everything you know is, from the reader's point of view, about nothing in particular. The reader cannot tell who it is for or what it will change for them, so it does not get finished or acted on. Everything you know is raw material. The book is the part of that material that moves one specific reader through one specific decision. The rest is the next book, a talk, or a chapter you cut.

Do I have to figure this out before I hire anyone?

No, and that is the practical reason this step trips up so many business owners. The common advice treats knowing what your book is about as solo homework you complete before you are allowed to start. In an interview-based process it is the opposite. Deciding what the book is about is the first milestone of the engagement, not a prerequisite for it. You arrive with your business and your goals; the discovery process converts those into a defined book.

Who decides what the book is about at Paperback Expert?

It is decided in milestone 01, the Brand Strategy Questionnaire and Book Blueprint Discovery, and it is owned by a specific team role: the Message Development Specialist, whose job is to clarify your core message and unique positioning before a single word is written. You are the source of the expertise and the business context. The specialist's job is to ask the questions that turn that into a Book Blueprint, so writer matching and outline development in milestones 02 and 03 build on a decision, not a guess.