79% Agreement
October 16, 2026— Visibility! This is the one thing which 79% of 300 authors we interviewed mentioned as their single biggest challenge. How to stand out from the crowd? Let us take a look at the Kindle market to illustrate the point. The total number of e-books available on Amazon.com is more than 6 million. The number of English-language e-books approaches 4.7 million by now. And this represents just a snapshot of a point in time. Every month another 70,000 titles are added to the platform, translating into approximately 18% annual growth in Kindle e-book supply.
The implications of this are clear: The indie author's biggest challenge for the time to come is visibility. How to stand out from the crowd? How to get noticed at all? No, a Kindle user is not going to browse through hundreds of thousands of titles to make up his mind what to read next. Most readers will click on the book that is shown to them or highlighted.
So, how to get one's book noticed? One strategy is clearly to focus one's efforts on book marketing. This is a must-do for all authors, and there is a myriad of blogs and books about it. The other often ignored strategy is to target one's writing to specific niche markets that represent a clearly identifiable group of readers and are less crowded.
Degree of Competition in Kindle Market Segments
So let's have a closer look at the Kindle e-book market (which some sources claim to represent more than 70% percent of the U.S. e-book market.) What is the competition in the various book genres?
The degree of competition in Non-fiction is about 70% higher than in Fiction. No big surprise. But who would have thought – on the next level of detail – that Religion & Spirituality is the single biggest main category on Kindle in terms of book supply?

On the other end of the spectrum, you find genres such as Law, Travel and Engineering & Transportation. There, the number of English speaking titles is around or less than 70,000. Now, this is still a lot, and to make sense of this, one must do two things.
Two Essential Strategies For Your Book Market Niche
First, relate the number of titles (=competition) to the level of sales the respective book genre. The target is to identify those niches that show the highest book sales but contain the fewest books in the category. This is exactly what you can do when you subscribe to our monthly K-lytics Kindle category database.
Second, you have to "niche it down." In other words, you have to take the analysis to the next level of detail. On the next level of detail, you will find more than 426 book sub-categories (and corresponding Top 100 Best Seller lists on Amazon). And many of them break down into 3rd level sub-sub-categories (of which there are more than 2,500) and even 4th level book genres (i.e., sub-sub-sub-categories)..
Key Takeaway
Know your market. Book publishing and marketing only works (with some degree of prediction) if you know what market you target, what the commercial potential it represents and what the degree of competition is that you will be facing. K-lytics makes all these factors transparent. Want to see for yourself? - Have a look at our home page to find out what K-lytics can do for you.
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