An Ikura interior is a small math-logic board: nine circles, the digits 1 to 9 once each, six printed totals. In Look Inside that is the whole difference from another number book. It is not a 9×9 fill-in. It is not a missing-number line. It is not a cage grid.
Ikura is the generator. This page is the KDP listing: what the shopper sees, how long the file is, and why the first pages cannot look like sudoku. How the puzzle works is already written in How Ikura Puzzles Work. A generate walkthrough for this module is not live on the site yet — do not send readers to a create URL.
Sudoku, Number Blocks, and Smart Numbers are other number products. They get their own interiors. Do not merge them into “number puzzles vol. 1.”
What Look Inside has to show
On Amazon the first interior pages are the pitch. A sample that opens on a copyright brick or a 9×9 empty sudoku has already lost.
Show a real Ikura board: circles, a few digits already given, totals on the rows and the columns. A rail of leftover digits on the side is fine if that is how you print the book. Print the rules once, short, on page one. Do not turn the sample into a how-to-play chapter. The play guide owns the rules.
Match the cover. If you promised easy, the first board is Easy — five given digits. If you promised a hard collection, the first board is sparse. The board never grows. Difficulty is how many digits are already given, not a bigger grid. Five givens prints Easy. Four or three prints Medium. Two or fewer prints Hard. A book that visibly climbs uses those three bands, not the same four-given page with a new label.
Every published board has one solution. You do not need to invent a uniqueness claim.
Page count is the product
Each Ikura is a pair: puzzle sheet plus answer sheet. Page count is those pairs, not a pile of empty circles. A thirty-pair warm-up and a hundred-pair climb are different royalties and different Look Insides. Padding Easy boards to look thick is a different product from a mix that earns the page count.
The difficulty mix is the listing. Same 3×3 family, three titles: Easy warm-ups, a mixed climb, a Hard set. The shopper who opens the first one knows what the next two are. There is no word list to source and no theme pack to swap. Givens, quantity, the printed label.
Puzzle Book Studio is the assembly step for trim, heads, and the key section. Instant Puzzle Books is the fast PDF from current settings. Time Saver (Productivity) is the batch that fills the mix in one run. None of those belong as steps here.
The four-channel map is the product-form article. A short Etsy pack or a TPT worksheet is a cut of the same board, not the KDP PDF with a new filename.
What not to sell this as
Do not sell it as sudoku. The category may be number puzzles. The page is nine circles and six totals.
Do not sell the KDP PDF as a TPT worksheet or an Etsy pack. A classroom set wants fewer pages and a key you can withhold; a paperback wants the keys in the file.
Do not sell this listing as a website game. Online play is live on this module: Productivity Interactive exports JSON and HTML for the BookPublisherTools WordPress plugin or a self-hosted player. Lifetime license, per product — see the editions page. The Amazon product is still the print interior. The playable extra is already written: Online Playable Ikura for Website. A default catalog is a menu. A finish-screen button is only there if you opted into a leveled game under Catalog Merge → Game Options. Upload steps live in Publish a Puzzle Catalog.
Commercial rights for books on KDP are part of the Puzzle Maker Pro license as stated on the homepage. Check the edition you actually buy if you are selling. That is not a substitute for Amazon’s content rules.
The whole point
An Ikura KDP book is a small math-logic interior whose first pages do not look like sudoku. Show a real 3×3 board in Look Inside, make the given-digit mix the product, pair every puzzle with its key, and leave the rules on the play guide.