---
title: "How to Start a Puzzle Book Business on Amazon KDP (2026 Guide)"
description: "A complete, numbers-first guide to publishing puzzle books on Amazon KDP: picking a niche, how many puzzles you need, the print specs Amazon enforces, exactly what you earn per copy, and the eight steps to a live listing."
canonical_url: "https://puzzlebindery.com/blog/how-to-start-a-puzzle-book-business-on-kdp"
source: "PuzzleBindery"
---
[Home](https://puzzlebindery.com/) › [Blog](https://puzzlebindery.com/) › How to start a puzzle book business

# How to Start a Puzzle Book Business on Amazon KDP

Everything you need to publish your first puzzle book — with the actual print specifications, the actual royalty maths, and no pretending it's passive income.

Updated August 2026 · 14 min read

**On this page**

1.  [Is this a real business?](#reality)
2.  [Choosing a niche that sells](#niche)
3.  [Format, length and trim size](#format)
4.  [Making the puzzles](#making)
5.  [Building the interior](#interior)
6.  [The cover](#cover)
7.  [Uploading to KDP](#publishing)
8.  [What you actually earn](#money)
9.  [Mistakes that cost people money](#mistakes)

## Is this a real business?

Yes, but not the one the YouTube thumbnails promise. Puzzle books sell steadily because the audience is enormous and durable — commuters, grandparents, classrooms, gift-buyers — and because a puzzle book doesn't go out of date. A word search about the seaside works as well in 2030 as today.

What it is not is passive. The people earning meaningful money publish **many** books, treat covers and keywords seriously, and understand that a single title is a lottery ticket while thirty titles is a portfolio. Expect your first book to earn very little. Its real job is to teach you the pipeline.

Amazon prints on demand, so you do not need to buy inventory upfront. Budget for your time, tools, proof copies, any outsourced work and marketing. Sales depend on reader demand and how effectively you reach those readers.

## Choosing a niche that sells

The single biggest mistake is publishing "Word Search Book for Adults". You are competing with thousands of identical titles and no reason for anyone to pick yours.

Instead, be specific about _who_ the book is for and _what_ occasion it serves:

-   **Large print for seniors** — consistently the strongest segment. Bigger grids, fewer puzzles per page, 8.5×11 trim.
-   **Gift-shaped books** — "Retirement gift", "Get well soon", "80th birthday". People buy these on a deadline and don't price-compare.
-   **Themed collections** — gardening, birdwatching, classic cars, faith, a specific decade. The theme does the marketing.
-   **Seasonal** — Christmas, Halloween, Easter. Predictable annual demand, but you must publish 8–10 weeks early.
-   **Kids activity books** — mazes and easy word searches, 8×10, bright covers.

### How to check demand before you build

Search Amazon for your idea and look at the **Best Sellers Rank** on the results. As a rough guide for paperbacks: under 100,000 means the book sells daily; 100,000–500,000 means a few sales a week; above a million means it sells almost never. If the whole first page is above 500,000, demand is thin. If the first page is full of books ranked under 50,000 _and_ they all look professionally made, competition is stiff — look for a narrower angle.

What you want is a page of results that sell reasonably well but look mediocre. That gap is your opportunity.

## Format, length and trim size

Amazon's most common puzzle-book trims:

| Trim | Best for |
| --- | --- |
| 6 × 9 in | Standard word search and sudoku collections. Cheapest to print. |
| 8.5 × 11 in | Large print, kids activity books, anything needing a roomy grid. |
| 8 × 10 in | Children's activity books. |
| 7 × 10 in | A middle ground — roomier than 6×9, cheaper than letter. |

**Length:** aim for **80–120 puzzles**. Below about 60 the book looks thin next to competitors and is hard to price above $6.99. Above 150 you're adding printing cost without adding much perceived value. Remember every puzzle needs a solution too, so 100 puzzles is roughly 100 puzzle pages plus 8–15 solution pages plus front matter.

Two hard rules from Amazon: a paperback must be **at least 24 pages**, and the total page count must be **even**.

## Making the puzzles

Three routes, in ascending order of sanity:

-   **By hand** — fine for one book, unbearable for ten.
-   **Hire a freelancer** — $30–200 per book interior. Works, but the cost recurs with every title and you lose the ability to iterate quickly.
-   **Use a generator** — the only approach that scales. Most charge $16–30 per month.

Whichever you choose, insist on two things. Every sudoku must have **exactly one solution** — plenty of free generators produce grids with multiple valid answers, and reviewers notice. And every puzzle must be **unique to your book**: if your generator produces the same output for everybody, you risk publishing a duplicate of someone else's title.

### Try it free

PuzzleBindery generates word searches, sudoku, mazes, cryptograms, crosswords and more, and every puzzle comes from a fresh random seed so no two books are alike. Single puzzles are [free forever](https://puzzlebindery.com/word-search-maker).

## Building the interior

Your interior is a single PDF containing every page in order: front matter, puzzles, then solutions. What trips people up is not the puzzles — it's the margins.

Amazon requires an **inside margin (gutter) that grows with page count**, because thicker books curve more at the spine:

| Page count | Minimum gutter |
| --- | --- |
| 24–150 | 0.375" |
| 151–300 | 0.5" |
| 301–500 | 0.625" |
| 501–700 | 0.75" |
| 701–828 | 0.875" |

Outer, top and bottom margins must be at least 0.25" (0.375" if you use bleed). Crucially, the gutter **alternates sides**: on odd-numbered pages it's on the left, on even pages it's on the right. Get this backwards and every other page has text disappearing into the binding.

Include a title page, a copyright page, and a solutions section. A "how to solve" page and a "this book belongs to" page cost you two pages and make the book feel considered.

Full detail in [KDP margins, bleed and spine width, explained properly](https://puzzlebindery.com/kdp-margins-bleed-and-spine-explained).

## The cover

Your cover is one image or PDF covering back, spine and front together. The formula:

-   **Width** = (trim width × 2) + spine width + 0.25" bleed
-   **Height** = trim height + 0.25" bleed
-   **Spine width** = page count × 0.002252" (white paper) or × 0.0025" (cream)

Spine width is the number people get wrong, and it's unforgiving — it changes every time your page count changes. Amazon also forbids spine _text_ at 79 pages or fewer, because binding drift would wrap your title round onto the front cover.

Design for the thumbnail. Most buyers see your cover at about 160 pixels wide in search results. A big, high-contrast title and one clear visual beats an intricate design every time.

### Get the numbers right

Our [free spine width calculator](https://puzzlebindery.com/cover-calculator) gives you the exact dimensions for your trim, page count and paper, plus a downloadable 300 DPI template with trim, bleed and the barcode keep-out marked.

## Uploading to KDP

1.  Go to **kdp.amazon.com** → Create → Paperback.
2.  **Title and subtitle** must match your cover exactly. Use the subtitle for keywords a buyer would actually search.
3.  **Author** — a pen name is fine.
4.  **Description** — lead with who it's for and what's inside. KDP accepts basic HTML for bold text and bullet lists.
5.  **Keywords** — seven slots, each up to 50 characters. Use phrases people type, not single words, and don't repeat words already in your title.
6.  **Categories** — three. Humor & Entertainment › Puzzles & Games is where most puzzle books live.
7.  **ISBN** — take the free KDP one unless you need your own imprint name.
8.  **Upload** interior and cover, then **run the previewer**. It is the only authority on whether your files are acceptable.

One more question you'll meet: whether you used AI tools. Answer honestly — Amazon collects this for its records, it isn't shown on your listing, and it doesn't affect approval. Algorithmically generated puzzles are not AI-generated content, but AI-written text (clues, descriptions) is.

## What you actually earn

For Amazon.com paperback sales, the royalty is **50% of list price at $9.98 or below, or 60% at $9.99 or above, minus printing costs**. These examples use black ink on white paper and Amazon distribution, not Expanded Distribution.

| Book | List price | Rate | Print cost | Royalty per copy |
| --- | --- | --- | --- | --- |
| 38 pages, 6×9 | $7.99 | 50% | $2.30 | ~$1.70 |
| 120 pages, 6×9 | $8.99 | 50% | $2.44 | ~$2.06 |
| 120 pages, 8.5×11 | $10.99 | 60% | $3.04 | ~$3.55 |

A 120-page 6×9 book costs $1.00 + (120 × $0.012) to print; the same page count at 8.5×11 uses the large-trim rate, $1.00 + (120 × $0.017). Royalties shown are rounded estimates before advertising, tools, other expenses and taxes.

Checked September 28, 2026 against KDP's [paperback royalty rules](https://kdp.amazon.com/en_US/help/topic/G201834330) and [printing costs](https://kdp.amazon.com/en_US/help/topic/G201834340). Confirm your exact book in KDP's pricing screen before publishing; marketplace and print options affect the result.

Use royalty per copy to decide what you can afford to spend acquiring a reader. Producing more books does not guarantee demand: test a specific audience, inspect a printed proof, and assess actual sales before expanding a series.

## Mistakes that cost people money

-   **Publishing a generic title.** No niche, no buyer, no sales.
-   **A cover that dies at thumbnail size.** Shrink it to 160px and look again.
-   **Wrong spine width.** The most common rejection, and it happens every time page count changes.
-   **Forgetting solutions.** Reviewers punish this hard.
-   **Puzzles with multiple solutions.** Cheap generators do this constantly.
-   **Skipping the proof copy.** Print quality, gutter feel and cover finish only reveal themselves on paper.
-   **Publishing one book and waiting.** This is a portfolio business.

### Ready to make one?

PuzzleBindery builds the whole interior — puzzles, front matter, page numbers, solutions and KDP-compliant margins — plus a matching cover with the spine width worked out from your live page count. Free to try, and a one-time $49 rather than a subscription.

[See the word search book walkthrough →](https://puzzlebindery.com/word-search-book-generator)