Low-Content and Puzzle Books on Amazon KDP: A No-BS Beginner's Guide

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Low-content books are the side gig that sounds fake until you see one in the wild: a sudoku book in a grocery store checkout, a gratitude journal on a friend's nightstand, a hiking logbook in a gift shop. Somebody made those. A lot of them were made by regular people at their kitchen tables and published through Amazon KDP.

This guide covers what low-content and puzzle books are, how publishing works, and how to do it without wasting months. Fair warning up front: this is not passive income on day one. It's a real small publishing business, and results vary wildly.

What is a low-content book?

A low-content book is one where the interior is mostly structure rather than prose. Think:

• Journals and notebooks (lined, dotted, prompted)
• Planners and logbooks (reading logs, workout trackers, password books)
• Puzzle books (sudoku, word search, mazes, crosswords)
• Activity and coloring books

Puzzle books sit in a sweet spot: buyers actually use them up and come back for more, and the "content" can be generated in a verifiable way, especially for number puzzles like sudoku.

How Amazon KDP works (the short version)

Kindle Direct Publishing (KDP) is Amazon's self-publishing platform. You upload a print-ready interior PDF and a cover, set a price, and Amazon prints each copy on demand when someone orders it. No inventory, no warehouse full of boxes in your garage. Amazon takes its share for printing and selling; you get a royalty on the rest.

A few things to know before you start:

• KDP has formatting rules (trim sizes, margins, bleed, cover dimensions). Files that ignore them get rejected.
• KDP has content guidelines, and it watches for low-quality or duplicate books. Don't upload the same interior fifty times with different covers.
• Read the current KDP help pages yourself; rules and royalty details change.

Step 1: Pick a niche, not just a puzzle type

"Sudoku book" is a crowded shelf. "Large-print sudoku for seniors," "sudoku for kids ages 8 to 12," or "sudoku and coffee: 200 puzzles for the morning routine" are niches. A niche tells a specific buyer, "this book is for you."

Good niche research is mostly browsing: search Amazon for your idea, look at what's selling, read reviews (especially complaints such as "print too small" or "puzzles repeat"), and look for a gap you can fill better.

Step 2: Create a genuinely good interior

The interior is the product. For puzzle books, that means:

• Valid puzzles. A sudoku with two solutions or none is a one-star review waiting to happen.
• Sensible difficulty. Label levels and actually match them.
• Readable layout. Big enough grids, clean fonts, room to pencil in notes.
• Answer keys. Always.
• Correct KDP formatting. Margins, page count and trim size.

You can do this by hand with design software, but it's slow and error-prone for hundreds of puzzles. That's where tools come in.

Tools that make interiors faster

Generating and laying out hundreds of valid puzzles by hand is slow and error-prone, so most puzzle publishers use some kind of generator, whether that's a dedicated puzzle-book app, a spreadsheet template or a script. Whatever you choose, check it against this list:

• Does it verify puzzles? Each sudoku needs exactly one solution.
• Does it export KDP-ready PDFs at your trim size with correct margins, or will you be fixing layouts yourself?
• Do you own the output? Read the license, especially for commercial use.
• One-time or subscription? Recurring fees eat into thin early royalties.

Remember that a tool only builds the interior. It doesn't do your niche research, cover or marketing, and everyone else using the same tool can make the same kind of book. Your angle is what sets you apart.

If you want one solid reference for the whole self-publishing process (accounts, formatting, pricing, marketing), Self-Publishing For Dummies covers the basics in plain English. And because your listing copy does the selling, a writing guide like Everybody Writes pays off here too.

If you want puzzle books that stand out: Shigai Royalty

Plain sudoku is a crowded shelf, so one tool I use myself is Shigai Royalty by IkePaz. It's software that makes print-ready murder-mystery deduction puzzle books (Murdoku-style) for Amazon KDP. You pick a scenario, a grid size from 6x6 up to 16x16 and a difficulty, and it builds the puzzles. Every puzzle is verified to have a single solution, which ticks the first box on the checklist above. It exports PDF, PNG, PPTX and SVG, and you don't need design skills to use it.

Pros: a less common puzzle type than plain sudoku; verified single-solution puzzles; several export formats for interiors and marketing images; no design skills needed.

Cons: it builds the interior, not your niche research, cover, listing or marketing; anyone else who buys it can make the same kind of book, so your angle still matters; and there are optional paid upgrades (Pro, Genten Royalty and Elite) you don't need to start. The front end is $21 at the time of writing. Check the sales page for current pricing, and order a proof copy before you publish.

Step 3: Make a cover that sells

Browsers decide in about a second. Your cover needs a big readable title even as a tiny thumbnail, a clear signal of who it's for ("Large Print," "For Kids"), and colors that pop against Amazon's white page. Free tools like Canva work fine; just use KDP's cover template for exact dimensions.

Step 4: Write a listing people can find

Your title, subtitle, description and keywords are how buyers (and Amazon's search) find you. Use the words a real buyer would type: "large print sudoku puzzle book for adults easy to hard with solutions." Be accurate, not stuffed. Don't use other brands' or authors' names.

Step 5: Publish, then build a series

One book is a lottery ticket. A series is a small catalog. If "sudoku for coffee lovers" gets a few sales, make volume two, a word-search companion, a holiday edition. Buyers who liked book one are the easiest people to sell book two to.

Realistic expectations

Some books sell steadily; many sell little or nothing. Low-content publishing rewards patience, testing and volume of different, quality books, not one upload and a prayer. Treat it like a garden: plant, check what grows, plant more of that.

Beginner checklist

1. Create a KDP account and read the formatting guidelines.
2. Pick one specific niche and audience.
3. Build an accurate, readable interior (by hand or with a puzzle generator).
4. Design a thumbnail-friendly cover with KDP's template.
5. Write a clear, keyword-rich listing.
6. Order a proof copy and check it with your own eyes.
7. Publish, track, and plan the next book in the series.

Want to go beyond puzzles into actual stories? Read our honest look at AI-assisted fiction co-writing.