10 Ways to Find Profitable KDP Niches for Low-Content Books

If you're thinking about publishing a book on Amazon KDP, it's easy to spend most of your time thinking about the cover, the title, the description, and how the interior should look.

Those things matter.

But there's another decision that can make a much bigger difference: the niche you choose.

You can create a beautiful journal, upload it to Amazon, and still make very few sales. Sometimes the problem isn't the design or the quality of the book. The problem is simply that there aren't enough people looking for that particular book.

Take gratitude journals, for example. They can sell, but the market is crowded with very similar products. Creating another generic gratitude journal and expecting it to take off is a very different proposition from creating one for a clearly defined audience with a specific need.

The good news is that finding a KDP niche doesn't have to be a guessing game.

There are practical ways to research what people are searching for, understand the competition, and find opportunities that other publishers may have overlooked.

In this guide, we'll look at 10 practical ways to find potentially profitable niches for low-content and medium-content KDP books. We'll also look at two questions that come up often: what types of books sell well on Amazon, and which KDP niches may offer opportunities in 2026.

Let's get started.

What actually makes a KDP niche profitable?

Before looking at the different research methods, it's worth understanding what you're actually looking for. A niche isn't automatically profitable just because you see lots of books in it. And finding one bestseller doesn't necessarily mean you've discovered a goldmine.

A healthier niche usually has three things:

• Demand – People are actively searching for the type of book you're considering.
• Opportunity – There is competition, but you can still see ways to create a better or more targeted product.
• Consistency – Sales aren't coming from just one unusual bestseller. Several books appear to be attracting buyers.

This is where many beginners go wrong. They see something popular and immediately want to publish it. Instead, look for the gap between what people want and what is currently available. That gap can be surprisingly valuable.

1. Start with buyer intent, not your own ideas

One of the biggest changes you can make to your KDP research is to stop starting with the question: "What book should I make?" Instead, ask: "What are people already looking for?"

That's a much better starting point. Go to Amazon and start typing a broad phrase into the search bar. Pay attention to the suggestions Amazon gives you before you've even finished typing.

For example, type: "anxiety journal for..." Amazon may suggest different audiences or purposes. You might see phrases related to teens, women, children, or other specific groups. Those suggestions can give you clues about how shoppers are actually searching.

You aren't starting with an idea pulled out of thin air. You're starting with something people are already interested in. Using a private or incognito browser can also help reduce the influence of your personal shopping history when you're doing this kind of research.

2. Try the "Alphabet Soup" method

Here's a simple research trick that costs nothing but a little time. Start with your main keyword and add a letter of the alphabet after it.

For example: "word search books for a" — look at Amazon's suggestions. Then try: "word search books for b" — then C, D, E, and continue through the alphabet.

You may uncover phrases such as specific audiences, occupations, age groups, interests, or themes that you hadn't considered. The nice thing about this method is that you don't need an expensive research tool to get started.

It can take a little patience, especially once you get further through the alphabet, but spending 15 or 20 minutes exploring these suggestions can give you plenty of ideas to investigate further. The important word here is investigate. Don't assume that every suggestion is a profitable niche. Treat each one as a lead that needs to be checked.

3. Look at BSR patterns, not just one bestseller

This is one of the easiest mistakes to make when researching KDP niches. You find a book with an impressive Best Seller Rank and think: "This niche must be making a lot of money." Maybe. But one successful book doesn't tell you enough.

That book could have benefited from a large existing audience, a promotional campaign, an unusually successful launch, or a temporary burst of attention. Instead, look at several books in the same niche.

Check their:

• Best Seller Rank
• Number of reviews
• Publication dates
• Overall positioning
• Cover quality
• Number of competing titles

You're looking for a pattern. If several books are performing reasonably well, that gives you more confidence that there is genuine demand in the category. The goal isn't to find one lucky book. You're looking for evidence that buyers are purchasing from the niche as a whole.

4. Look for weak spots in the competition

Seeing lots of competition doesn't automatically mean you should walk away. Sometimes competition is actually evidence that buyers exist. The more important question is: How good are the existing products?

Open the top results for your keyword and take a close look. Are the covers outdated? Are the titles almost identical? Are the descriptions poorly written? Do customer reviews mention formatting problems? Does the book appear to be targeting everyone instead of a clearly defined audience?

These weaknesses can give you ideas. You don't necessarily need an empty niche. In fact, completely empty niches can sometimes be a warning sign because there may not be enough demand. What you're looking for is a niche where customers exist but the current products leave room for improvement.

Your advantage could come from better design, better content, a more specific audience, or simply a more useful product.

5. Consider formats that are harder to produce

There's a reason generic notebooks and lined journals are so competitive. They're easy to make. Almost anyone can open Canva, create a simple interior, add a cover, and upload the book. That low barrier to entry means you're competing with a huge number of publishers.

Formats such as:

• Word search books
• Sudoku books
• Crossword books
• Activity books
• Themed puzzle books
• More detailed workbooks

...usually require more work. The puzzles have to be created and checked. The content needs to be organized properly. The final product needs to provide a good experience for the buyer.

That extra effort can discourage some competitors. For a publisher who is prepared to put in the work, that can be useful. The idea isn't to make your book unnecessarily complicated. It's to consider formats where quality and effort can give you an advantage.

6. Use a KDP keyword research tool

Amazon's search suggestions are a great place to begin, especially if you're working with a limited budget. But they don't tell you everything. Dedicated KDP research tools can provide additional information such as estimated search volume, competing keywords, related phrases, and competition indicators.

One example is Book Bolt. You can start with a broad keyword and use the tool to discover related phrases that you may not have thought about. Some tools also provide competition scores or grades, which can make it easier to compare different opportunities.

For example, you might discover two keywords with similar demand, but one has significantly fewer competing books. That's the kind of information that can help you decide where to spend your time.

Just remember that these tools provide estimates. Don't treat their numbers as guaranteed sales forecasts. Use them to guide your research, then verify what you're seeing on Amazon itself.

7. Go long-tail and get specific

Consider the difference between these two ideas: Notebook versus Medication and Symptom Log for Caregivers.

The first one is extremely broad. The second one tells you much more about the buyer, the purpose of the book, and the problem it is designed to address. This is where long-tail niches become interesting.

Instead of trying to compete for a huge generic keyword, you can start with a proven format and make it more specific. For example:

Puzzle book → puzzle book for seniors → large-print puzzle book for seniors → large-print themed puzzle book for seniors

The more specific you become, the smaller your potential audience may become—but the people who do find the book may be much more relevant buyers. This approach is sometimes referred to as niche stacking. You're combining a format, an audience, a topic, and possibly a specific purpose to create a more targeted product.

8. Validate the idea before you create the book

This step can save you a lot of wasted time. Before spending hours designing your cover or creating your interior, go back to Amazon and test the idea. Search for your main keyword and examine the first page of results.

Look at the review counts. A useful starting benchmark is to look for niches where some of the leading books have roughly 50 to 300 reviews. That doesn't mean a book with 20 reviews will automatically sell, or that a book with 1,000 reviews is impossible to compete with. It's simply a way of getting a feel for the market.

• If almost every result has thousands of reviews, you're looking at a market with some very established competitors.
• If almost every book has only a handful of reviews, don't automatically assume you've found a hidden opportunity. There may be very little demand.

You should also think about pricing. For books that provide enough value to justify it, a paperback price around $9.99 or higher can potentially provide more room for royalties than very low-priced books. Again, the exact economics depend on the book's size, printing costs, marketplace, and royalty structure. The point is to understand the numbers before you create the product.

9. Use AI to speed up research—but check everything

AI has changed the way people can research KDP niches. Tools such as Claude and other AI assistants can help you brainstorm niche ideas, identify potential audiences, generate keyword variations, and organize research much faster than doing everything manually.

That can be extremely useful. Imagine asking for 50 possible variations of a puzzle-book concept and then narrowing those ideas down to the five that look most promising. What AI shouldn't do is make the final decision for you.

An AI-generated idea can sound fantastic and still have almost no demand on Amazon. So use AI as a research assistant, not as a crystal ball. When you get an idea from AI, take it back to Amazon. Check the search results. Look at competing books. Examine reviews and BSR. Look at how recently competing titles were published. Then make your own decision.

AI can help you move faster. It doesn't remove the need for good judgment.

10. Think about the future of the niche

KDP is full of trends. One month, everyone is talking about a particular type of book. By the time you finish creating your product, interest may already be falling. That's why evergreen topics can be attractive. Examples include:

• Productivity
• Mental wellness
• Caregiving
• Children's learning
• Self-development
• Puzzles and brain games

But even evergreen categories can be extremely competitive. The goal is to combine an evergreen subject with a specific audience or purpose. And don't think only about one book. If you find a niche that works, consider whether you could build a small collection of related books.

For example, a publisher working in a particular puzzle niche might eventually create several themed books for the same audience. That gives you a catalog rather than a single title sitting on Amazon by itself. Over time, related books can support one another through Amazon's recommendations, repeat customers, and traffic between your titles.

Which KDP niche sells the most on Amazon?

There's no single KDP niche that can honestly be described as the biggest seller for every publisher, audience, and period. Low-content and medium-content formats continue to occupy a significant part of the KDP market, including journals, planners, coloring books, workbooks, puzzles, and activity books.

Among these, puzzle and activity books have attracted considerable attention from self-publishers because they can appeal to many different audiences. You can create puzzles for children, adults, seniors, families, hobbyists, professionals, students, and many other groups.

But the important lesson isn't simply: "Puzzle books sell." It's: "Specific puzzle books can solve a specific buyer's need." A generic puzzle book has to compete with thousands of other generic puzzle books. A well-targeted puzzle book gives you another angle to compete on.

What are some potentially profitable KDP niches in 2026?

Several types of books continue to attract interest from KDP publishers and buyers.

Themed and Specific Puzzle Books

Word searches, crosswords, Sudoku, and other puzzle books can become much more interesting when they are built around a specific theme, hobby, profession, or audience. Instead of simply creating a "Word Search Book," you could explore themes connected to a particular interest or group.

Bold and Easy Coloring Books

Large, simple designs can appeal to beginners and older adults who prefer less complicated coloring pages. Specific themes can also help differentiate the book from thousands of generic coloring books.

Cognitive and Brain Activity Books

Word searches, brain games, and other activities designed around memory and mental stimulation are another area worth researching. However, when creating products related to health, recovery, or cognitive conditions, publishers need to be particularly careful about the claims they make.

Caregiver and Profession-Specific Journals

A journal designed for a particular job or life situation can be much more targeted than a generic notebook. The key is understanding what information the buyer actually needs to record or organize.

Spot-the-Difference and Picture Activities

These formats can take considerably more effort to produce well. That difficulty can reduce the number of people creating them, while still leaving room for products that are genuinely enjoyable and well designed.

Grief and Emotional-Support Books for Children

This is a sensitive area, but there is demand for resources that help children understand difficult experiences such as loss. Quality, age appropriateness, and sensitivity are particularly important in this category.

Seasonal Large-Print Puzzle and Coloring Books

Seasonal books can benefit from predictable periods of increased interest. The advantage is that you can plan ahead instead of waiting for a trend to appear and then rushing to publish.

Frequently asked questions

The bottom line

Finding a profitable KDP niche isn't about discovering some secret keyword that nobody else knows. It's about paying attention.

Look at what buyers are searching for. Study the books already available. Look for weaknesses in the competition. Find specific audiences. Test your ideas before investing your time and money in production.

Most importantly, don't confuse low competition with good opportunity. Sometimes low competition means you've found a great opening. Sometimes it means nobody wants the product. Your job is to figure out which one you're looking at.

The publishers who approach KDP this way aren't simply uploading books and hoping Amazon will send them customers. They're researching first, creating with a particular buyer in mind, and building products around genuine demand. That's a much more deliberate way to approach KDP—and it gives every new book a better reason to exist.

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