Sudoku, word search or crossword: which to start with

If you're starting a low-content puzzle catalogue, pick the format by the work it asks of you and the reader you can reach, not by which looks easiest at a glance. Word search is the simplest to produce and the most crowded. Sudoku is nearly as easy to generate and sells worldwide without a word of translation. Crossword is the hardest to make well, which is exactly why it's the least commoditised. This is the honest trade-off across all three, including where each one is harder to sell.

The short version

Each row is a real decision, so here's what sits behind it.

Word search: easiest in, most crowded

Word search is the lowest-effort format to produce. You choose a theme and a word list, and the grid is generated around it. There's no single-solution rule to satisfy beyond placing the words cleanly, and a buyer solves it in a relaxed few minutes, which is why the audience is so broad.

That low barrier is also the catch. The shelf is deep, and a generic 100-puzzle collection with no angle sits unread. What still sells is a clear position: a theme, a defined audience, and genuinely readable large print. If you want the fastest path to a first published book, start here, but plan to specialise rather than compete on volume. The KDP word-search maker handles the generation; the full sell guide covers the listing.

Here is a real grid from the free generator, the same output the maker builds a book from:

Sudoku: sells everywhere, no translation

Sudoku's advantage is that the puzzle is numbers. A sudoku book reads the same in every country, so you're not limited to English-speaking buyers, and the demand is steady all year. Production is nearly as easy as word search: you pick a difficulty curve and the studio generates graded 9 by 9 boards.

The one rule you can't skip is that every board must have exactly one solution. A puzzle with two answers or none gets returned, and it's the complaint buyers raise most. Every board in the KDP sudoku maker is checked by a solver to have a single solution before it reaches a page. The trade-off is that sudoku is a fixed format, so you differentiate on difficulty, large print and audience rather than on content. The full sudoku guide walks the whole path.

Every board the generator makes is solver-checked for a single solution, like this one:

Crossword: hardest to make, least commoditised

Crossword is the format that rewards effort. A crossword book lives on its clues, and the clue list is the book's body copy, so it's real writing that a reader judges directly. That's why it's the hardest of the three to make well, and also why the shelf is less commoditised: you can't generate a good crossword book purely from a difficulty slider.

The studio meets you partway. The KDP crossword maker drafts a clue bank with AI that you review and edit, then generates graded grids from it. You still own the quality of the clues, which is the point. Crossword's payoff is a loyal, often daily audience who buys the next volume, but the work up front is real, and weak or repetitive clues sink an otherwise clean book. If this is the format you want, read how to make and sell crossword books on KDP before you start.

The free generator lays out and numbers the grid from your words, so you can judge the fit before writing clues:

So which one first

Start with the format whose work you'll actually enjoy, because a catalogue is a dozen books, not one.

• Want the fastest first publish? Word search, then pick a niche to escape the crowd.
• Want the widest market and least language friction? Sudoku, sold on a clear difficulty and large print.
• Willing to write, and want a loyal repeat buyer? Crossword, where the effort keeps competitors out.

All three come out of the same studio with a 300 DPI print-ready interior, a matching answer or solutions section, and a wraparound cover sized to your page count, and each export is run through a preflight check against your chosen KDP trim before you download it. Pick one format, publish three or four focused titles in it, and let the shelf earn before you branch into the next. Whichever you choose, the upload itself runs the same way, and the KDP paperback checklist walks it step by step.