Writers are bad at this in a specific and predictable way: they write a description that would satisfy someone who had already read the book. It is accurate, it is balanced, it mentions all the themes, and it sells nothing, because a stranger reading it has no reason to care about any of the nouns in it.
The description is the last piece of writing in the project and the one most likely to be done in twenty minutes. It is also, after the cover, the thing most responsible for whether the book sells at all.
The first two lines are the description
Every store truncates. On a phone a reader sees roughly two lines and a "read more" link, and most never tap it. Whatever is in those two lines has to do the whole job of making someone continue.
| Opening line | What a reader thinks |
|---|---|
| "This book explores the themes of…" | Nothing. They have gone. |
| "In a world where…" | They have read this opening a thousand times. |
| "Author of three novels, Jane…" | You are telling them about you. |
| "You have twenty minutes and no starter." | That is me. Go on. |
| "The archive had been sealed for fifty years. It was not empty." | What was in it? |
Non-fiction: promise, proof, contents
Non-fiction is bought to solve a problem, so the description is an argument that this book solves it. Three movements, in this order:
- The problem, in the reader's words. Not "time management is a challenge for many professionals" — "you finish the day having done everything except the thing you meant to do." Specific enough that the right reader flinches.
- The promise. What is different after they have read it. One sentence, concrete, and not a claim you cannot keep.
- The proof. Why you. Experience, results, or simply the work — "forty interviews", "eleven years of doing this badly before doing it well".
- What is inside. Four to six bullets, each an outcome rather than a chapter title. "How to price a first product without guessing" beats "Chapter 4: Pricing".
- Who it is for, and who it is not. The second half is more persuasive than the first, and it prevents refunds.
Length: 150 to 250 words. Long enough to answer the practical questions, short enough that the bullets are still visible on a phone.
Fiction: character, trouble, stakes, hook
Fiction is bought for the experience of reading it, so the description is a sample of the tension rather than an account of the plot. Four movements, and none of them is a synopsis:
- Someone specific, in one clause. A name and a situation, not a biography.
- Something wrong, by the end of the second sentence. The trouble arrives immediately or the reader does not.
- What it costs. The stakes, stated once, in terms that matter to a person rather than to a world.
- A question you do not answer. The last line of a fiction description is a door, not a conclusion.
Length: 100 to 175 words. The commonest failure in fiction descriptions is not being boring — it is being complete. A description that walks through the plot has removed the only reason to read the book.
What to cut
| Cut | Why |
|---|---|
| "A must-read" | Nobody has ever been persuaded by this |
| "Page-turner", "gripping", "unputdownable" | Claims about the reading experience, from the person who wrote it |
| A theme list | Themes are what a book is about, not what it is |
| Review quotes at the top | They belong after the pitch, if at all |
| Your qualifications, first | Relevant in non-fiction, third |
| Anything in the third act | You are selling the first chapter, not the last |
One more: comparisons to famous books. "Perfect for fans of X" is genuinely useful and genuinely risky — it sets an expectation that the book has to meet on page one. Use it when the resemblance is real and specific, not as a way of borrowing someone else's reputation.
Formatting, and what stores allow
Most retailers accept a small amount of HTML in the description field — usually bold, italic, line breaks, headings and simple lists — and reject or strip the rest. What that means in practice is that a wall of text is a choice, not a limitation.
- Short paragraphs. Two or three lines each. Long ones are not read on a phone.
- Bullets in non-fiction, never in fiction, where they break the spell you are trying to cast.
- Bold sparingly — a bolded first line and nothing else is more effective than five bolded phrases.
- No headings shouting at the reader. "WHAT YOU WILL LEARN" in capitals reads as a sales page from 2011.
- Write it as plain text first, then add markup. If it does not work unformatted, formatting will not save it.
The description is not the blurb on the back
They overlap and they are not the same thing. The store description is read by someone deciding whether to click, in a list of thirty other books, on a screen. The back cover is read by someone already holding the book, who has decided at least that much, and who has more room and more patience.
| Store description | Back cover | |
|---|---|---|
| Read by | Someone browsing | Someone holding the book |
| Competing with | Thirty other results | Nothing |
| Length | 100–250 words | 100–150 words plus author bio |
| Formatting | A little HTML | Typeset, with space around it |
| First line's job | Stop the scroll | Confirm a decision |
If you are producing a print edition, the back cover also has to be laid out rather than pasted — text, bio, and often a barcode area, inside a cover file that has a spine and bleed to get right before any of the words matter.
Testing it without an audience
- Read the first two lines aloud to someone who has not read the book. If they do not ask a question, rewrite them.
- Check it on a phone, in the store's own preview, truncated. That is the version that exists.
- Search your own category and read the top ten descriptions in a row. Yours should not be the one that sounds like all of them.
- Leave it a day and reread the first sentence. It is still throat-clearing. Cut it again.
- Change one thing at a time after launch. The description can be edited whenever you like, which makes it the cheapest experiment in publishing — and the only one where a rewrite costs an afternoon rather than a re-export.
The last point is worth taking seriously. Cover, price and description are the three things you can change after publishing, and of those the description is the one most people write once and never touch. It sits beside the pricing decision and, like pricing, it is worth revisiting with real sales data rather than defending because you already wrote it.
It also has to survive being pasted into a form with a character limit, which is a good argument for keeping it in the same folder as the manuscript, in plain text, along with the title, categories and keywords it will be uploaded next to.