How to Create a Sudoku Activity Book and Publish It on Amazon KDP for Passive Income
If you’ve ever dreamed of earning passive income through self-publishing, you might think it requires writing novels or designing complex guides. But what if you could create a book that doesn’t need any original writing — and is still in demand? That’s exactly what Sudoku activity books offer.
Thanks to tools like the Free Sudoku Generator for KDP publishers at PuzzleGenerator.org, you can now design and format complete Sudoku books in just a few clicks — no design skills or expensive software required.
In this post, you’ll learn how to generate Sudoku puzzles, format your book for KDP, design a simple cover, and publish your activity book to start earning royalties — even while you sleep.
Why Sudoku Books Are a Great Passive Income Idea
Sudoku books are a prime example of low-content publishing. They require no traditional writing and cater to a wide range of readers — from kids and seniors to puzzle lovers and casual gamers.
Here’s why they work:
- High evergreen demand – Sudoku never goes out of style.
- Low production time – Puzzles can be generated instantly.
- Global market – Numbers are universal; no translation required.
- Scalable – You can publish multiple volumes or levels (easy, medium, hard).
- Perfect for print – Paperback activity books are still popular on Amazon.
With the right presentation and formatting, even a simple puzzle book can bring in consistent royalties for years.
Step 1: Generate Sudoku Puzzles for Free
To create your book interior, you’ll need a collection of high-quality Sudoku puzzles. You can generate them using free tools like the one available at:
PuzzleGenerator.org (Free Sudoku Maker for KDP Publishers)
This web-based platform allows you to:
- Choose puzzle difficulty (Easy, Medium, Hard)
- Select grid layout (1, 2, 4, 6, 9, 12 puzzles per page)
- Download as PDF or PNG
- Generate matching solutions
- Customize fonts, colors, and styles
- Export clean, print-ready pages instantly
Since there’s no watermark and it’s free for commercial use, this makes it ideal for KDP publishing.
Tips:
- Aim for at least 100 puzzles per book.
- Group puzzles by difficulty or mix them for variety.
- Include solutions at the back (essential for buyers).
Step 2: Format Your Book for Amazon KDP
Once you’ve downloaded your Sudoku pages as a PDF, the next step is to prepare your file for upload. KDP accepts interior PDFs formatted to standard trim sizes.
Popular sizes include:
- 8.5” x 11” (great for puzzle books)
- 6” x 9” (portable format)
Use tools like Canva, Affinity Publisher, or Adobe InDesign if you want to add intro pages, instructions, or custom layouts. But even a simple file with clean puzzles and a solution section will work fine.
Make sure to:
- Use KDP’s print previewer to check margins and layout
- Ensure pages are in grayscale for paperback (unless you’re making a color edition)
- Set bleed correctly if your puzzles extend to the page edge
Step 3: Create an Eye-Catching Cover
Your cover is the most important marketing asset for your book.
You can use free tools like:
- Canva (with KDP cover templates)
- Book Bolt Designer
- Adobe Express
Your Sudoku cover should:
- Clearly say “Sudoku Puzzle Book”
- Mention difficulty level or range (e.g., Easy to Hard)
- Include the number of puzzles (e.g., 100+ puzzles)
- Feature clean, bold typography
- Avoid overused stock images or clip art
Amazon also provides a Cover Calculator Tool to help generate a proper template based on trim size and page count.
Save your final design as a high-resolution PDF and make sure it fits the KDP template.
Step 4: Publish Your Book on Amazon KDP
Go to kdp.amazon.com and sign in or create an account.
To publish your Sudoku book:
- Click “Create Paperback”
- Fill in your book title, subtitle, author name, and description
- Choose keywords like:
- sudoku puzzle book for adults
- easy sudoku for kids
- brain games and logic puzzles
- Select categories: Juvenile Nonfiction / Games or Games / Puzzles
- Upload your interior PDF and cover file
- Preview everything and approve
- Set your price
For a 100-page puzzle book, pricing around $6.99–$8.99 is typical depending on your niche and competition.
You’ll earn a royalty of 60% minus print costs (around $2.15 for black and white printing under 108 pages).
Step 5: Market and Repeat
Once published, your book will appear on Amazon within 72 hours. You can start promoting it on social media, Pinterest, or puzzle forums — or just let Amazon’s organic traffic do the work.
Want to scale? Repeat the process with:
- Different difficulty levels
- Themed puzzle books (e.g., holiday Sudoku, animal-themed)
- Mixed activity books (Sudoku + Word Search)
The process is fast, scalable, and surprisingly creative.
Final Thoughts
Creating a Sudoku activity book and publishing it on Amazon KDP is one of the most beginner-friendly ways to enter the world of self-publishing and passive income. With free tools like the Sudoku Generator, you don’t need design skills, software licenses, or months of effort.
It’s a low-risk, high-potential strategy that anyone can start — even today.
Focus on clean formatting, appealing design, and clear puzzle structure. With a few well-made books and consistent quality, you can build a portfolio that generates income for years to come.
Your first puzzle book is just a few clicks away.