Can you really publish books in minutes? I tested Book Ninja. Read my honest review to see if this AI software creates real assets for Amazon KDP or just junk.
You want to make money on Amazon. You see people posting screenshots of their royalties. They make thousands of dollars a month selling simple eBooks. You want to do the same.
The problem starts when you sit down to work. You stare at a blank screen. You do not know what to write about. You worry about formatting. You panic about designing a cover.
Most people quit right here. They never publish a single book. The technical work feels too hard. The writing takes too long.
Book Ninja Review
Book Ninja claims to fix this. It is a new software tool designed for Amazon KDP (Kindle Direct Publishing). It promises to help you find profitable topics, write the content, and design the cover. It does all this in minutes, not weeks.
This review tests those claims. I looked at the features, the ease of use, and the final quality. You need to know if this tool creates real assets or just junk.
Check the current deal price on WarriorPlus here.
What is Book Ninja?
Book Ninja is a cloud-based software suite. You access it through your web browser. You do not need to download anything. It focuses on automating the entire self-publishing process.
Most tools only do one thing. Some write text. Others design covers. Others find keywords. Book Ninja combines these steps into one dashboard.
It targets two specific types of books:
- Non-Fiction Information Books: Short guides on topics like “How to train a puppy” or “Basics of Gardening.”
- Mid-Content Books: These include coloring books, puzzle books, and journals.
The creators built this for beginners. You do not need technical skills. You do not need to be a professional writer. The software uses artificial intelligence to do the heavy lifting.
The goal is speed. The system removes the roadblocks that stop you from hitting “Publish.”
Key Features Breakdown
You need to understand what you get for your money. I examined the four main pillars of this software.
The Niche Finder
Success on Amazon starts with the right topic. You cannot just write about anything. You need a topic that people search for.
Book Ninja includes a research tool. It scans Amazon for trending keywords. It shows you what is selling right now.
- You type in a broad idea like “Health.”
- The tool suggests specific sub-niches like “Keto Diet for Beginners” or “Yoga for Seniors.”
- It shows you the competition level.
This feature saves you money. You do not need to buy separate research tools like Publisher Rocket immediately. You can find a winning idea inside the dashboard.
Check the current deal price on WarriorPlus here.
AI Content Generation
This is the main engine. Once you pick a topic, the AI takes over.
- Chapter Creation: You enter your book title. The software suggests chapter headings. You can accept them or change them.
- Content Writing: You click a button, and the AI writes the paragraphs for each chapter.
- Formatting: The text comes out formatted. It includes headings and bullet points.
The quality is solid for basic information. It reads well. It uses clear English. You should still read it over, but the rough draft is done for you in seconds.
Mid-Content Creator
This feature excites me the most. Amazon sells millions of coloring books and puzzle books. These are “mid-content” because they have some content but not thousands of words of text.
Book Ninja generates these pages automatically.
- Coloring Pages: You select a theme. The software generates black-and-white line art ready for coloring.
- Puzzles: It creates crosswords, Sudoku, and word search puzzles.
- Journals: It lays out lined pages with prompts.
You can combine these. You could make a book that is half information and half journal. This adds value for the buyer.
Built-in Cover Designer
Amazon creates strict rules for book covers. If your image is the wrong size, they reject it. If the text is too close to the edge, they reject it.
Book Ninja solves this. It has a built-in graphics editor.
- Templates: It provides pre-made designs. You just change the text.
- Sizing: The canvas is already set to the correct dimensions for Kindle or Print-on-Demand.
- Image Library: You get access to stock photos to use on your cover.
You do not need to hire a designer on Fiverr. You do not need to struggle with Photoshop. You create a professional cover in the same tab where you wrote the book.
Check the current deal price on WarriorPlus here.
Hands-On Demo: Creating a Book in 3 Steps
I want to show you the workflow. This is what you will do when you log in.
Step 1: Research and Planning
You open the Niche Finder. You search for “Indoor Plants.” The tool tells you that “Succulent Care” is trending. You decide to create a guide called “The Lazy Guide to Succulents.”
Step 2: Generation
You go to the eBook Creator. You type in your title. The AI suggests 10 chapters.
- Choosing the right pot.
- Watering schedules.
- Sunlight needs.
- Common pests. (And so on).
You click “Generate.” The software writes about 500 to 1,000 words for each chapter. It adds an introduction and a conclusion. The whole process takes about five minutes.
Step 3: Exporting
You check the text. You fix a few typos. Then you go to the Cover Creator. You pick a template with a green plant image. You type your title.
You click “Download.” You get two files:
- A PDF for the interior.
- A JPG or PDF for the cover.
These files are ready for Amazon KDP. You just log in to Amazon and upload them.
Pros & Cons
No software is perfect. You need to know the good and the bad.
Pros (What I Liked)
- Speed: You can finish a project in one sitting. This builds momentum.
- Cost: You pay once. Most AI writing tools charge you every month. Book Ninja creates a lifetime access model during the launch.
- Simplicity: The dashboard is clean. Buttons are big and labeled clearly. A child could use this.
- Commercial Rights: You own the content. You can sell it on Amazon, Etsy, or your own website. You keep 100% of the profits.
- Variety: It handles both text-heavy books and image-heavy coloring books.
Cons (What Could Be Better)
- AI Needs Oversight: The AI writes good English, but it is not a human expert. It might make simple mistakes. You must read the book before publishing.
- Cover Customization: The cover tool is great for beginners. However, it lacks advanced layers like Photoshop. If you want a complex artistic cover, you might feel limited.
- Support Response: WarriorPlus sellers sometimes take 24 hours to answer support tickets.
Pricing and Upgrades (The Funnel)
Book Ninja uses a “launch funnel” structure. The price starts low, but optional upgrades exist.
Front End: The Core Software (~$17 – $27) This gives you the main features. You get the eBook creator, the niche finder, and the cover designer. You can create a specific number of books per month. For most beginners, this is enough.
Upgrade 1: Pro / Unlimited Edition This usually removes limits. You can create unlimited books. It often unlocks faster server processing. If you plan to mass-produce books, you need this.
Upgrade 2: Done-For-You (DFY) Content This package includes ready-made books. The team did the work for you. You just upload them. This is good if you have zero time, but unique content is usually better.
Upgrade 3: Agency License This lets you use the software to do work for clients. You could sell your book-writing services on Fiverr and use Book Ninja to fulfill the orders.
Check the current deal price on WarriorPlus here.
My Recommendation: Start with the Front End. It costs less than a pizza. Test it out. If you make money, you can buy the upgrades later.
Comparison: Book Ninja vs. Hiring Freelancers
You have two main choices for creating books. You can use software, or you can hire people.
Option A: Hiring Freelancers (The Expensive Way) You go to a site like Upwork or Fiverr.
- Writer: A decent ghostwriter charges $200 for a short book.
- Editor: You pay another $50 for proofreading.
- Cover Designer: A custom cover costs $50 to $100.
- Total Cost: $300+ per book.
- Time: You wait two to three weeks for delivery.
Option B: Using Book Ninja (The Smart Way) You buy the software.
- Software Cost: ~$17 (One-time fee).
- Writer: Included (AI).
- Editor: You do it yourself.
- Cover Designer: Included.
- Total Cost: $17.
- Time: You finish in 45 minutes.
Verdict: If you have a budget of $5,000, hiring pros creates a premium product. If you are just starting and have a small budget, Book Ninja wins easily. It allows you to fail fast and learn fast without losing money.
How to Make Money with Book Ninja
Buying the tool is step one. Using it to generate income is step two. Here is a strategy you can follow.
Strategy 1: The Volume Approach (Mid-Content) Focus on coloring books and puzzle books. These do not require reading.
- Use the Niche Finder to find a specific hobby (e.g., “Fishing”).
- Create a “Fishing Word Search” book.
- Create a “Fishing Coloring Book.”
- Publish both on Amazon KDP.
- Repeat this for 10 different hobbies. You build a library of assets. Each one might only sell a few copies a month, but 50 books adding up creates a nice income.
Strategy 2: The Series Approach (Non-Fiction) Pick a broad topic like “Self-Sufficient Living.”
- Use the AI Writer to create a short guide on “Growing Vegetables.”
- Create a second guide on “Canning Food.”
- Create a third guide on “Solar Power for Beginners.”
- Link these books together. Inside Book 1, tell readers to buy Book 2. This increases your customer lifetime value.
The “Secret” Benefit: Building an Email List
Most people forget this part. You can use Book Ninja to build a business outside of Amazon.
You create a short, helpful PDF report. You give it away for free on social media. People give you their email address to get the report.
Now you have an email list. You can send them affiliate offers. You can sell them other products.
Book Ninja makes these “lead magnets” instantly. You do not need to write a 100-page book. A 10-page guide works perfectly. The software spits this out in minutes. This is a massive shortcut for affiliate marketers.
Who Should Buy Book Ninja?
This tool helps specific groups of people.
Total Beginners You have never published a book. You feel overwhelmed by the process. Book Ninja holds your hand. It removes the technical barriers.
Affiliate Marketers You need bonuses to give away. Creating a custom eBook as a bonus for a product review increases your conversion rate. Book Ninja creates these bonuses on demand.
KDP Publishers You already sell on Amazon. You want to scale up. You want to test new niches quickly. This tool speeds up your workflow. You can test a niche with an AI book before you spend money on a human writer.
Freelancers You want to sell services. You can offer “eBook Writing” or “Puzzle Book Creation” on Fiverr. You use the software to do the work. You keep the profit.
FAQs regarding Book Ninja
Does this work on Mac and PC?
Yes. Book Ninja is cloud-based. You log in through your internet browser (Chrome, Firefox, Safari). It works on Windows, Mac, and even a tablet.
Do I own the copyright to the books?
Yes. The content generated is yours. You have full commercial rights. You can put your name as the author.
Is the content unique?
The AI generates new text every time. However, facts are facts. If you write a history book, the dates will be the same. For creative topics, the output is unique enough for Amazon. It is always smart to run it through a plagiarism checker just to be safe.
Can I upload directly to Amazon?
The software gives you the files you need (PDF, JPG). You must log in to your Amazon KDP account to upload them. No software uploads directly to Amazon for you due to security rules.
Is there a refund policy?
WarriorPlus products usually have a refund period (often 30 days). Check the specific terms on the sales page. If the software does not work as promised, you can get your money back.
Final Verdict
Book Ninja offers a powerful shortcut. It replaces the need for expensive writers and designers. It turns the complex task of publishing into a simple checklist.
The software is not magic. It will not make you a millionaire while you sleep. You still need to pick good niches. You still need to write good descriptions on Amazon.
But it does solve the biggest problem: Creation. It gets you from “Idea” to “Finished Product” faster than any other method.
If you value your time, this investment makes sense. For the price of a cheap lunch, you get a publishing team in your pocket.
Click here to get Book Ninja and start your publishing journey today.