I Tried Shigai Royalty So You Don't Have To — Honest Review

Okay, real talk for a second.
 
If you've ever published a puzzle book on Amazon KDP, you know the feeling. You spend a weekend making a sudoku book, upload it, feel proud for about six hours... and then you check your dashboard three weeks later and it's sold two copies. Both to your mom.
 
That's not because your book was bad. It's because you published into a niche with 9,000 other identical books, and Amazon buried you on page 50 the moment you hit publish. I've been there. I know exactly what that feels like — you did everything "right," followed the YouTube tutorial, picked a "trending" category, and still landed in a graveyard of lookalike covers.
 
So when I heard about Shigai Royalty, I was skeptical. Another "push-button puzzle software"? I've bought two of those already and they collect digital dust in a folder I never open. But this one's actually different, so let me walk you through why, in as much detail as I can, so you're not just taking my word for it.

Here's the link if you want to just go look at it yourself →

So What Actually Is This Thing?

In plain English: it's software that builds murder-mystery-style logic puzzle books for you. Not word searches. Not sudoku. Actual whodunit puzzles — suspects, a scenario, clues that are all true, and a grid where the reader deduces who did it (or in the heist mode, who took it, or in the creature-hunt mode, which creature it was).

It feels like a completely different animal from the puzzle books everyone else is publishing, and that's kind of the whole point. Instead of asking "how do I make a slightly better sudoku book than the other 9,000," you're asking "what if I just... published in the category that's basically empty?"

That reframe alone is worth sitting with for a second, because it changes your whole strategy. You're not trying to out-market people in a crowded space. You're trying to be early in an empty one.

Why This Category Is Actually Smart

Here's the thing nobody tells new KDP publishers: it's not that puzzle books stopped selling. It's that everyone piled into the same three formats (sudoku, word search, coloring) because those are easy to make. Deduction puzzles never got that treatment because building one by hand — where every clue is true and the grid only has ONE correct answer — is genuinely difficult. Most people can't do it without messing up the logic somewhere.

Think about it from a puzzle-design standpoint. With sudoku, there are algorithms and generators everywhere — it's a solved problem, technically speaking, which is exactly why it's oversaturated. A deduction/logic-grid mystery is a completely different beast. You need consistent, non-contradictory clues, a scenario that makes narrative sense, and a solution path that a human can actually reason through without brute-forcing it. Get one clue wrong, and the whole puzzle either has multiple possible answers or no answer at all. Either way, you've got an angry customer and a refund request.

That difficulty kept the shelf empty. Shigai Royalty just... removes the difficulty. It's not magic, it's just an engine doing the boring hard math part so you don't have to. Somebody built the hard, unglamorous verification logic once, and now you get to benefit from it every time you click "generate."

Getting Started: What The Actual Process Looks Like

I want to walk through this part because I think it's where a lot of these tools either win or lose you. Some "push-button" software still ends up being a three-hour ordeal once you actually open it.

With Shigai Royalty, the flow is genuinely simple:

First, you pick your scenario. This is the fun part, honestly. You're not stuck with one flavor of mystery — you can go classic murder mystery, switch to a heist ("find the thief" instead of "find the killer"), do a creature-hunt version, or drop into the kid-friendly mode if you're targeting a younger audience or a family/classroom market.

Then you set your grid and difficulty. Grid size ranges from 6×6 all the way up to 16×16, and difficulty runs from Easy up to the hardest tier, which is (a little dramatically, but I respect it) called "Dragon." This combination is what actually determines how long and how hard the puzzle is to solve.

You click generate, and the engine does the heavy lifting. This is where the seven different deduction engines come in — the software doesn't just spit out the same logic pattern every time, it varies the structure so your books don't all feel like reskins of each other. It builds the case, the clues, the hint ladder, and a full solution walkthrough, and it checks that the whole thing resolves to exactly one valid answer.

Then you export. PDF for straight-to-KDP paperback uploads, PNG for printable marketplaces, and PPTX or SVG if you want to open things up and customize layouts, covers, or promo material yourself.

That's genuinely it. No plotting sessions, no wrestling with Canva to line up a grid, no hiring a freelancer and just hoping they got the logic right because you have no way to check it yourself.

Go check the current price before it changes →

What I Actually Liked

You pick a scenario, not just a template. Classic murder mystery, a heist version, a "find the creature" mode, and even a kid-friendly mode. That alone means you're not stuck making the same book forty times — you can spin off multiple little sub-niches from one tool. If you want to test a few different angles before committing to a full series, this makes that painless.

Grid size actually changes the vibe of the book. 6×6 feels like a fun, breezy Saturday-morning puzzle — something you'd hand a kid or someone who wants a light 15-minute brain teaser. 16×16 is a legit "grab a coffee and focus" puzzle, the kind of thing a hardcore logic-puzzle fan will actually respect. Having that whole range, combined with five difficulty settings from Easy up to Dragon, means you can build a real series — book 1 for beginners, book 5 for people who want to suffer a little (in the fun way).

Every puzzle is checked for you. This was honestly my biggest worry going in — what if the puzzles are broken? They're not. Every single one gets verified to have exactly one correct, logically-reachable solution before it's in your book. That's the difference between a 5-star review and someone leaving you a furious one-star saying "this puzzle has no answer, waste of money." If you've ever self-published anything, you know one bad review early on can genuinely sink a new listing. This is the exact risk this software is built to eliminate.

It doesn't lock you into one file type. You can export as PDF (for KDP), PNG (for printable shops like Etsy), and it also gives you PPTX and SVG if you want to go in and tweak anything yourself. I liked that it didn't box me into one workflow — some tools I've used before only give you one export option and then you're stuck reformatting everything manually if you want to sell somewhere else.

The hint system is a nice touch I didn't expect. Every solution page comes with a hint ladder and a step-by-step walkthrough, not just a bare answer key. That matters more than it sounds like — a buyer who gets stuck and has zero guidance quits the book and never buys volume two. A buyer who can nudge themselves forward with a hint actually finishes, which is what turns a one-time buyer into a repeat customer for your whole series.
 
What I'd Tell You to Expect Realistically
 
I'm not going to sit here and tell you this prints money while you sleep, because that's not how KDP works, ever, no matter what software you use. If anyone tells you otherwise, be skeptical of them, not just the software.
 
You still have to:
 

What this software does is remove the part that was genuinely blocking most people — the actual puzzle creation and verification — which was always the biggest time sink and the scariest part to mess up. It doesn't replace the publishing side of the business, and honestly, I'd be suspicious of anything that claimed it did.
 
Who I'd Actually Recommend This To
 
If you're already publishing on KDP and you're tired of watching your books sit at zero sales in an oversaturated category, this is worth trying. If you're a printable seller looking for a product type buyers haven't seen a hundred times already on Etsy, same thing. If you want to build a themed gift business — personalized mystery books with a friend's name as a suspect, that kind of thing — the custom cast and room-naming options make that pretty simple too.
 
If you're looking for a truly hands-off, zero-effort income stream, I'd skip this one — not because it doesn't work, but because nothing actually works that way, and you'll be disappointed by any product that promises it.
 
Bottom Line
 
If you're already publishing on KDP or thinking about starting, and you're sick of fighting for scraps in an oversaturated niche, this is one of the more genuinely different tools I've come across recently. It's not "another spin on sudoku" — it's a whole category most publishers aren't touching yet, made accessible without needing to be a puzzle designer, a writer, or a graphic artist.
 
The verification piece alone is what sold me. Anyone can slap together a grid and call it a puzzle. Very few tools actually guarantee it's solvable before it reaches your customer, and that one detail is the difference between a business you can scale and a pile of one-star reviews you have to apologize for.
 
Worth a look, honestly.
 
Grab access to Shigai Royalty here →