If you’ve tried self-publishing books on Amazon KDP and saw little to no sales, the issue probably wasn’t KDP itself…it was the niche.

In 2025, success on KDP doesn’t mean publishing books in saturated niches. It means entering niches that are evergreen, quietly trending, and still packed with opportunity.

Here are 3 such niches you can still win in this year and beyond:

1. Math Workbooks (Still a Bestseller for a Reason)

If there’s one thing that will never go out of demand, it’s education. And to help kids succeed, parents are always looking for helpful resources they can use at home.

That’s where math workbooks come in — and why this niche continues to perform year after year.

I’ve seen this myself while publishing on KDP. Whether it’s simple addition and subtraction practice or multiplication timed tests, parents want structured, ready-to-use materials that can supplement what their kids are learning in school.

And the best part? This is an evergreen niche. You’re not chasing a trend that fades in a few months. Kids will always need math help — and parents will always search for printable or physical books that make their lives easier.

📌 My tip: Pick one specific grade level, like 2nd grade, and create a focused, well-formatted workbook. Stick to a clean layout, add answer keys at the back, and once it’s live, build a small series around it.

For example:

• 100 Timed Tests for Grade 2
• Grade 2 Multiplication Workbook
• Grade 2 Word Problems

Once one book start selling, the rest tend to follow.

I personally use two tools help me create amazing math workbooks fast;

1. Titans Pro: To find low competition niches with decent demand.
2. Math Worksheets Generator: To create math workbooks super fast.

2. Gratitude Journals (But With a Twist)

We’ve all seen gratitude journals before — they’ve been on Amazon and Etsy for years.

But here’s the thing most people overlook: they’re still selling, and in some cases, they’re selling really well.

The key now is to niche down. Generic gratitude journals don’t stand out anymore. But when you create something that speaks directly to a specific group of people — that’s where the magic happens.

Instead of creating another plain “Gratitude Journal,” try something like:

• Gratitude Journal for Moms — designed with prompts that speak to the daily chaos, emotions, and small wins moms experience.
• Gratitude Journal for Burned-Out Entrepreneurs — mix gratitude with productivity reflection and mental clarity check-ins.
• Gratitude + Mood Tracker Combo — combine simple daily gratitude prompts with mood tracking to help users stay mindful and aware.

People want to feel seen. When a buyer reads your title and thinks, “This is exactly what I need” — that’s when you make the sale.

To find sub-niche ideas with low competition but great demand, you can use a KDP keyword research tool like Titans Pro.

As you can see in the screenshot above, using Titans Pro, I’m already seeing a couple of potential niche ideas for a gratitude journal.

🎯 So, make it specific. Make it feel personal. And package it in a way that solves a real emotional need. That’s how even the most common product can stand out and sell in 2025.

3. Activity Books for Adults (Quietly Trending)

When most people think of activity books, they think of kids. But here’s a niche that’s quietly gaining momentum: activity books for adults.

And trust me, there’s serious potential here.

In today’s fast-paced world, more and more adults are looking for simple ways to unplug, relax, and de-stress. That’s where adult activity books come in.

These are low to medium-content products that don’t require much writing or designing, but they deliver real value to the end user.

Some ideas you can explore:

• Large Print Word Search Books — perfect for seniors or anyone who wants something easy on the eyes.
• Brain Games and Logic Puzzles — ideal for adults who enjoy staying mentally sharp.
• Simple Coloring Books for Stress Relief — no intricate designs, just clean, calming pages anyone can enjoy.

The best part? These books often become repeat purchases. If someone enjoys your word search or puzzle book, there’s a high chance they’ll come back for more — especially if you’ve created a branded series.

🧠 Pro tip: Pay attention to formatting and audience. A book designed for seniors should be large print, easy to read, and have clear instructions. For relaxation or mental health niches, calming titles and soft aesthetics help boost conversions.

So while everyone else is rushing to create kids’ books or planners, this adult-focused niche remains quietly profitable for those who pay attention.

🧩 Bonus Tip: If you’re planning to dive into the adult activity book niche, tools can seriously speed up the process.

Self Publishing Titans recently dropped 21 brand new puzzle tools, bringing their total to 50+ tools designed specifically for activity and puzzle book creators.

These include word searches, cryptograms, logic puzzles, mazes, and much more — all easy to customize and ready for KDP.

I’ve personally found them incredibly useful for saving time while keeping quality high.

👉 Check out the full Puzzle Tool bundle here.

If you’re serious about publishing in this niche, these tools are a game-changer.

Final Thoughts

You don’t need to chase trends that disappear in a month. You need niches that solve real problems and serve real people.

These 3 niches are not only beginner-friendly — they also have long-term potential if you commit to quality and consistency.

Affiliate Disclaimer: This post contains affiliate links — I may earn a small commission if you make a purchase, at no extra cost to you.