How to make and sell sudoku books on Amazon KDP

Sudoku is one of the steadiest corners of Amazon KDP's low-content shelf: the demand is year-round, the audience is broad, and a good book is mostly a matter of a clear difficulty level and a clean, large-print interior. The value is in the format, not any prose. This guide walks the whole path, from picking a level to uploading a print-ready file, and you can make your first puzzle free in a browser before you commit to a full book.

What "low-content" means for a puzzle book

A low-content book has little or no written manuscript, because the reader does the work of solving the puzzles. That changes what you produce. You're not writing chapters; you're laying out graded grids and their solutions onto pages sized for print at a KDP trim size that passes review.

Step 1: pick a level and an audience, not just "sudoku"

"Sudoku" is far too broad to rank or sell. A niche is a difficulty plus an audience: easy large-print sudoku for seniors, a hard-to-evil book for enthusiasts, a gentle for-beginners book, or a graded set that climbs from easy to expert. Pick something specific enough that the book is obviously for one person. Large print is the demand in much of this niche, not a nice-to-have, and a large-print sudoku set is a strong first book.

Step 2: make the puzzles

Try the free sudoku generator→ first. Pick a difficulty, press generate, and you get a printable board with exactly one solution, plus its solution page, with no sign-up and no watermark. It's the same solver our studio uses, so what you see is what a book page will look like.

A whole book needs more than one board. When you're ready, the KDP sudoku maker generates hundreds of graded 9 by 9 puzzles across a difficulty curve, verifies each one has a single solution, and builds the solutions section at the back. You unlock a project once for $4.99 and export it as many times as you like.

Step 3: get the interior specs right

This is where most first books fail review. Every KDP paperback needs correct margins, a gutter margin that grows with page count, and, if anything runs to the page edge, bleed. The studio sizes all of this per trim, and a preflight check reads the file against KDP's own rules before you upload, so an out-of-spec export gets caught rather than rejected by Amazon.

The short version: pick a common trim, keep a roomy outer margin around each grid, and let the tool size the gutter for your page count. We wrote the exact numbers up in the word search interior specs guide, and the margin and gutter maths are the same for sudoku.

Step 4: pair every puzzle with its solution

A book of unsolvable puzzles gets returned. Every board needs a matching solution, and the solutions need to be easy to find. The studio packs a numbered solutions section at the back, in the same order as the puzzles, so a reader can check any board in seconds and every solution is the one and only answer for that grid.

Step 5: make a cover and set up the listing

The studio exports a print-ready wraparound cover PDF alongside the interior PDF: back, spine and front on one sheet, sized to your page count. For this niche a simple, high-contrast title over a solid background is enough, so you don't need a designer. If you'd rather build your own, KDP's cover calculator gives you the exact wrap dimensions for your page count.

For the listing, write a title and subtitle that name the level and format, such as "Large Print Easy Sudoku for Adults, 120 Puzzles", fill the seven keyword slots with phrases a buyer would type, and choose two browse categories.

Step 6: understand the maths

KDP pays a royalty after printing costs, and for a black-and-white paperback printing is priced per page. A large-print book with fewer, roomier pages can be more profitable than a cramped one, so don't pack four tiny grids onto a page to save paper. Price in the range buyers expect for the niche, usually a few dollars, and let the catalogue earn over time rather than any single title.

A realistic first project

Make one free puzzle to see the output. Pick a specific level and audience. Generate around 120 graded puzzles with solutions in the studio, export the interior at a large-print trim, make a simple cover, and upload. Then do it again for the next level. The earning comes from a shelf of focused books, each easy to find because it's clearly for one reader. If word search or crossword suits you better, the same studio makes those too, starting with how to make and sell word search books on KDP.