Jikan Nazo Review: Build Verified Number-Mystery Puzzle Books For Amazon KDP — Without Writing A Word
One number on the page is the answer. The clues eliminate the rest. Jikan Nazo builds the whole book — and proves every puzzle has exactly one solution before it exports.
Jikan Nazo Overview
Jikan Nazo is a Find-the-Number mystery engine for Amazon KDP publishers and printable sellers. Each book prints a register of numbers; the clues eliminate every entry until exactly one survives. You pick a difficulty — Gentle, Standard or Fiendish — plus register size and trim, then click generate. In one run it builds the register, clues, front and back matter and a coded answer key, and verifies the book has exactly one solution before export. No writing, design or math skills needed.
It was created by Ike Paz (book & printable seller), Luke Bowes (digital product developer) and Marina Matic (creator of the time-crime mystery engine).
Ike Paz
Book & Printable Seller
Luke Bowes
Digital Product Developer
Marina Matic
Time-Crime Engine Creator
How Does Jikan Nazo Work?
Create
Choose difficulty (Gentle, Standard or Fiendish), register size and trim. Click generate — the engine builds and verifies the register, clues, front matter, back matter and answer key in one run. Guided setup helps with your first book.
Export
Every KDP trim size, with margins, gutter, bleed and mirrored margins handled, plus 18pt large print, page numbers and chapter titles. A pre-flight check tests the book against KDP’s print requirements before you upload.
Collect
Upload to Amazon KDP as a paperback, or sell the same book as a printable. Then generate the next one for your catalog.
Key Features & Benefits
Verified Elimination Engine
Every clue is true, exactly one entry survives, and removing any single clue re-opens the case — proven before export. Benefit: no broken puzzles that lead to bad reviews.
Whole Books In One Run
Up to 42,000 entries generated, clued and verified in a single run, with batch generation for series. Benefit: build a catalog fast.
Full KDP Page Setup
All KDP trim sizes, margins, gutter, bleed, mirrored margins, 18pt large print, page numbers, chapter titles and title banks, plus a pre-flight check. Benefit: no Canva or Word formatting fights.
Front & Back Matter + Coded Answer
This-Book-Belongs-To page, copyright, rules pages, coded answer page and reveal page. Benefit: a complete book, not a stack of puzzles.
Answer Key With Proof
For every clue, the key names an entry only that clue eliminates. Benefit: proof-read a book without solving it.
Custom Imports & Seeded Generation
Import your own number lists and chapter titles. The same seed rebuilds the same book; book and asset library included.
Flexible Exports
Unlimited high-res PNG plus 100 print-ready PDFs per month — for KDP paperbacks and printable marketplaces.
Commercial Rights
Per the vendor, everything you create is 100% yours — full commercial rights, no lock-in and no recurring fees on this offer.
Who Is Jikan Nazo For?
Jikan Nazo is built for Amazon KDP publishers and printable sellers who want to publish puzzle books without writing, design software or logic skills. The vendor suggests these book ideas:
Classic Number Hunts
“Find the Number” mystery books from Gentle to Fiendish.
Large-Print Editions
18pt large print is built in for the senior puzzle market.
Difficulty-Ladder Series
Book 1 Gentle, later volumes Fiendish.
Travel & Activity Books
Bite-size one-page mysteries for trips and waiting rooms.
Classroom Brain Teasers
Printable logic packs for teachers.
Custom Number Books
Your own number list and chapter titles for themed or personalized books.
What Beta Testers Say
“I made a few books. Found no bugs in the quiz logic. There was only one answer!”
“Clean, intuitive… Knowing that each puzzle can be checked for accuracy gives me greater confidence in the books I create.”
“Absolutely no other tool comes close.”
Jikan Nazo Pricing
Front-End Launch Price
One-time payment · No recurring fees on this offer · Works on Mac & PC
What Happens After I Click “Buy Now”?
- You go through a secure checkout.
- You get instant access to the software and your launch bonuses.
- You’ll be shown optional upgrades (listed below) — you can accept or skip each one.
- Guided setup walks you through your first book.
- Support is available — Ike, Luke and Marina are in the member group.
Jikan Nazo OTOs / Upgrades
Upgrades are optional. The front end works on its own.
OTO 1: Pro — $57
9 registers (phone, timestamp, time, lottery ticket, IP address & more), print-format picker, page frames, fonts, 7 languages, unlimited PDF + PPTX + DOCX export.
OTO 2: Premium — $187
10 story registers (dates, coordinates, coded names, colors, addresses, card hands…), the Casebook with printed story pages, SVG export, and everything in Pro.
OTO 3: Icon Nazo — $47
A second engine for icon-based mystery puzzle books — same one-click verified build, every export format, kid-friendly and gift-book angles.
Launch Bonuses (Included Free)
Bonus 1: PDF Page Mover
Reorder, insert, swap and delete pages inside any PDF interior. Value: $97
Bonus 2: KDP Keyword Finder
Find search terms buyers type on Amazon and fill all 7 KDP keyword slots. Value: $197
Bonus 3: Description Helper
Write your Amazon book description faster. Value: $97
Headline Bonus: Mekuri
Turn any PDF into a video flip-through of the book — runs in your browser, no video editing needed.
Pros & Cons
Pros
- Every book verified to exactly one solution before export
- Whole book in one run — up to 42,000 entries
- All KDP trim sizes + pre-flight check
- 18pt large print built in
- Answer key that proves every clue
- Low $19 entry price, no recurring fees on this offer
- Commercial rights included
Cons
- No refunds — all sales are final
- Front end limited to 100 PDF exports per month
- Unlimited PDF, Word and PowerPoint exports require the Pro upgrade
- Extra register types are only in the upgrades
- Results depend on your own publishing work — not a get-rich-quick tool
Who Should Avoid It?
- People looking for an overnight-money button
- People who won’t follow simple step-by-step instructions
- Publishers happy competing in crowded, saturated niches
- People unwilling to invest a little time up front
Frequently Asked Questions
Do I need writing or puzzle-design experience?
No. The engine generates the register, clues, front/back matter and keys. Guided setup walks you through your first book.
Is every puzzle really solvable?
Yes. Before export, each book is proven to leave exactly one answer, every clue is true, and removing any single clue re-opens the case.
How big can a book be?
Up to 42,000 entries in one run.
What difficulty levels are included?
Gentle, Standard and Fiendish.
Does it handle KDP formatting?
Yes — every KDP trim size, margins, gutter, bleed, mirrored margins, 18pt large print, page numbers and chapter titles, plus a pre-flight check.
What are the export options?
Unlimited high-resolution PNG and 100 print-ready PDFs per month. Unlimited PDF, Word and PowerPoint exports are in the Pro upgrade.
Can I use my own numbers or titles?
Yes, you can import your own number list and chapter titles.
Where can I sell these books?
On Amazon KDP as paperbacks, and as digital printables on Etsy-style marketplaces.
Do I need a website or email list?
No. You publish on existing marketplaces.
Are there monthly fees?
No recurring fees on this offer — it’s a one-time purchase.
Do I get commercial rights?
Yes. Per the vendor, everything you create is 100% yours with full commercial rights.
What if I get stuck?
Ike, Luke and Marina are in the member group, and support is included.
Is there a money-back guarantee?
No. The vendor states that due to the digital nature of the product and instant access, all sales are final. Training and support are included.
Final Verdict: Is Jikan Nazo Worth It?
My Take
If you publish on Amazon KDP or sell printables and want a puzzle format beyond word search and sudoku, Jikan Nazo is worth a serious look. Its biggest strength is the verification: every book is proven to have exactly one solution before export, and the answer key shows why each entry is eliminated — which protects you from broken puzzles.
Keep two things in mind: there are no refunds, and the front end is capped at 100 PDFs a month. At $19 for the front end, it’s a low-cost way to test a new niche — just go in expecting to put in your own publishing work.
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