Make a Puzzle Book to Sell on KDP

Self-publishing a puzzle book is real, and people genuinely make money at it. It is also crowded and slow to pay off. Here is the honest version, with the boring production details that actually decide whether your book looks professional.

By Allen Mitchell — founder, ZillaKit · Published July 2026

Amazon Kindle Direct Publishing (KDP) lets anyone upload a print-ready PDF and have Amazon print and ship a paperback on demand — no inventory, no upfront cost. Puzzle books are popular with self-publishers because they are "low content": no writing, no editing, just well-made puzzles laid out cleanly. That low barrier is exactly why the category is competitive. I want to walk you through it honestly, including the part where I tell you not to expect a fortune.

Pick a niche, not "word search book"

The most common beginner mistake is publishing a generic Word Search Puzzle Book and hoping. That title competes with tens of thousands of others and has no reason to be found. The books that sell are specific: Large Print Word Search for Seniors, Australian Native Animals Word Search, Bible Word Search for Teens, Word Search for Nurses. A niche does three things — it narrows the competition, it tells the shopper the book is for them, and it gives you a themed word list to build around.

Go where you have some genuine knowledge or a real audience. If you are a nurse, a puzzle book of medical terminology has built-in credibility and gift appeal. Large-print books for older readers are a durable, evergreen niche precisely because the accessibility need is real. Before committing, search Amazon for your idea and look at the top few results: how many reviews do they have, how recently were they published, and is there an obvious gap — a theme nobody has covered, or existing books with tiny fonts that a large-print version would beat?

Trim size and margins — get these right or it looks amateur

KDP offers several trim sizes; for puzzle books the two workhorses are 8.5 × 11 inches (US Letter, roomy, great for large-print grids) and 6 × 9 inches (standard paperback, more portable, tighter on space). Letter size is the safer choice for word searches because a big grid needs breathing room.

Margins are where amateur books betray themselves. KDP requires an outer margin of at least 0.25 inch, but the number that catches people out is the inside (gutter) margin — the extra space near the spine that the binding swallows. For a book under 150 pages, allow at least 0.375 inch on the inside; for thicker books, more. If you ignore the gutter, the innermost letters of your grid disappear into the spine and reviewers will mention it. Design your page with the gutter in mind: keep the grid and word list clear of that inner edge.

KDP also needs a small amount of bleed only if your content runs to the very edge of the page; most puzzle interiors sit inside the margins and do not need bleed. Export your interior as a PDF at the exact trim size — do not let a word processor scale it.

How many puzzles per book

A common, sensible range is 40 to 100 puzzles. KDP requires a minimum of 24 pages, and a book that is too thin feels flimsy and cannot carry a readable spine. If each puzzle takes a page and each answer key takes a page (or you group several solutions per page at the back), 50 puzzles plus solutions plus a title page and instructions lands you comfortably around 110 pages — a satisfying book that still prints cheaply. Do not pad with junk to hit a page count; a tight 60-puzzle book beats a bloated 120-puzzle one with careless grids.

Making the puzzles — and the licensing that matters

This is the production heart of the book, and it has to look consistent across every page. Our Word Search Book Maker is built specifically for this: you feed it your themed word lists and it lays out a whole book of puzzles with matching answer keys, ready to drop into your KDP interior. Because everything runs in your browser, your themed lists never leave your device.

The critical detail for anyone selling a book is licensing. Many free online generators are fine for personal use but forbid commercial resale, or stamp a watermark on the output. You cannot sell a book with someone else's logo on every page, and you should not sell content you do not have the right to. ZillaKit's puzzle output is watermark-free and carries a commercial licence, so the puzzles you generate are genuinely yours to publish and sell. That single point saves a lot of people from a nasty surprise after they have already listed a book.

Uploading to KDP

The upload itself is straightforward. Create a KDP account, start a new paperback, and enter the metadata — title, subtitle (this is prime keyword real estate, use it), author name, description, categories and seven keywords. Choose your trim size, upload your interior PDF and a cover, and KDP's previewer shows you exactly how it will print. Use the previewer seriously: page through it and check no grid is clipping into the gutter. You order a physical proof copy before publishing — do it, because seeing your book in your hands reveals problems no screen does. Then set your price and publish; approval usually takes a day or two.

You will also need a cover. KDP's Cover Creator is basic but workable for a first book; the spine width depends on your page count, and KDP gives you a template for it.

Realistic earnings — the honest part

Here is the truth I promised. Most puzzle books sell a handful of copies a month, and many sell almost none. On an 8.5 × 11 paperback priced around $7, your royalty after printing costs might be $2 to $3 a copy. A book selling one copy a week is earning you perhaps $10 a month. People who make real money do it through volume and iteration: they publish many well-targeted books, learn which niches move, and compound over a year or two. It is a portfolio game, not a lottery ticket.

The upside is that there is no downside beyond your time. It costs nothing to publish, the books stay listed forever, and a title that finds its niche keeps earning quietly. Treat your first book as tuition — you will learn the whole pipeline — and judge the model on your tenth book, not your first. If you enjoy making the puzzles, the economics are a lot easier to stomach.

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