The KDP niche research checklist

Niche research is where most low-content publishers either save themselves weeks of wasted work or lose them. The problem is rarely a lack of information. It is doing the steps in a random order, skipping one, or falling for a niche before checking whether anyone is buying.

This checklist gives you a repeatable process for any idea, from “gardening journal” to “sudoku for kids.” Work through it in order, write down what you find, and you will end up with a clear yes, no or “go narrower” for each niche. It takes practice to do quickly, but the steps stay the same.

Step 1: Define the buyer and the use

Before you open Amazon, write one sentence that answers two questions: who is buying this, and what will they do with it?

• Weak: “A fishing journal.”

• Strong: “A fishing log for weekend bass anglers who want to record spots, lures and conditions.”

If you cannot write that sentence, the idea is still too vague to research. Decide also whether the buyer is the user or a gift giver, because that changes how you will write the title and description later.

Step 2: Search Amazon like a buyer

Go to Amazon and type the phrases your buyer would use. Then:

1. Note the autocomplete suggestions. They show how real shoppers phrase their searches and often reveal narrower angles.

2. Search two or three variations. “Bass fishing log,” “fishing journal for men” and “fishing logbook” may show different books.

3. Filter mentally for relevance. Ignore results that are clearly a different product, such as fishing guides or novels.

4. Look at the covers and titles on page one. Are they professional and specific, or generic and dated?

Step 3: Read the numbers on page one

Open the top ten or so relevant results and note a few figures for each. As a rough guide:

• Best Sellers Rank (BSR). Below about 50,000 is usually crowded by big publishers and ads. Roughly 100,000-300,000 often means steady modest sales. Above about 1,000,000 usually means very few buyers.

• Review counts. If several top books have under 50 reviews, there is likely room. If every top book has 500 or more, move on or go narrower.

• Prices. Note the range. You will need it for your profit math.

• Page counts and trim sizes. These tell you what buyers in this niche expect.

One book with a great BSR is not proof of a niche. Look for several books selling at reasonable ranks, which shows the demand is spread across more than one lucky title.

To speed up this step, you can type the interest into NicheFlow and compare the Competition and Profit scores of the sub-niches it suggests. Its BSR, review and price figures are AI estimates, so spot check the best ideas on Amazon before deciding.

Step 4: Read the reviews for gaps

Reviews are the most useful free research you can do. For the top three to five books, read the one to three star reviews first, then skim the five star ones.

Look for:

• Complaints you can fix. “Lines too close together,” “paper bleeds,” “not enough pages,” “print too small.”

• Missing features. “I wish it had a section for weather” is a product brief handed to you.

• Who bought it and why. “Bought this for my husband who fishes every weekend” tells you about the gift angle.

Write down the three most common complaints. If your book can solve them, you have a reason to exist in the niche.

Step 5: Check feasibility and profit

A niche can have buyers and gaps and still be wrong for you.

• Can you make it well? Some interiors are simple to build. Others, like original crosswords or detailed coloring pages, take much more time or skill.

• What will it cost to print? Printing cost depends on page count, trim size and ink type. Use KDP’s own pricing calculator for exact figures.

• Does the royalty make sense? For paperbacks on Amazon.com, KDP’s royalty is 60% of list price minus printing costs. Run the numbers at the price you plan to charge, and check that you still earn something worthwhile.

• Can you build more than one book? A niche that supports a small series is usually worth more than a one-off.

Step 6: Check trademarks and policy

Before you commit to a title, check that you are not using protected names or phrases.

• Search the USPTO trademark database for key words and phrases in your title and cover.

• Avoid brand names, characters, sports team names and slogans you do not own.

• Review KDP’s content guidelines, especially for low-content books, as they can change.

This is general guidance, not legal advice. If something seems borderline, choose a different phrase.

Step 7: Decide and record

End every research session with a decision and a note. A simple record for each niche might include:

• The niche in one sentence

• Typical BSR range and review counts on page one

• The top three gaps from reviews

• Your planned price and estimated royalty

• Any trademark concerns

• Decision: go, no, or go narrower (and which direction)

Over time, these notes become a library of ideas you can return to, and they stop you from researching the same niche twice.

Quick checklist

• Write a one-sentence buyer and use statement

• Search Amazon with two or three buyer phrases

• Note autocomplete suggestions

• Record BSR, reviews, prices and page counts for the top results

• Read one to three star reviews of the top three to five books

• List the three most common complaints

• Check you can make the interior well

• Run royalty math at your planned price

• Search the USPTO database for title words

• Record a clear go, no or go narrower decision

FAQ

How long should niche research take?

It varies with experience. A first pass can be quick once you know what to look for, but give promising niches a proper look at the reviews and profit math before you commit to design work.

What if a niche passes some checks but fails others?

Usually that means you need to go narrower or adjust the angle. High competition with clear review complaints, for example, often points to a smaller audience or a better designed version that addresses those complaints.

Do I need paid tools to research KDP niches?

No. Everything in this checklist can be done with Amazon, KDP’s help pages and the USPTO search. Tools can speed up the first pass and help you compare many ideas, but they do not replace reading the market yourself.