Most authors are in the wrong categories. Here's how to find the right ones.
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Amazon gives you 2 category slots in KDP. Most authors pick the most obvious ones - which are dominated by books with thousands of reviews. You'd need to sell 200 copies a day to hit top 100. There are better categories, less obvious ones with lower competition where your book could realistically rank. You just don't know they exist.
Without Category Finder:
With Category Finder:
Enter your book's topic and we search Amazon to find the subcategories where similar books rank well. We score each category for competition level, showing you the estimated daily sales needed to hit top 100. We also show you the email trick to get into up to 10 categories - most KDP authors don't know this is possible.
Three steps from sign-up to insight.
Enter a topic, keyword, or niche. We find the Amazon subcategories where books like yours appear.
We analyze competition, average review counts of top books, and BSR thresholds.
Choose 2–3 high-opportunity categories and request them via KDP support email.
PublishRank's flagship feature is daily Amazon book monitoring. Every book you add to your account is scanned every day for BSR shifts, new reviews, ranking changes, and bestseller badges - with instant email alerts the moment something happens and a weekly Monday digest summarising every book in one email.
This tool sits on top of that monitoring data. Your scores, gaps, and recommendations refresh automatically as your real-world metrics change, so the advice you see today is based on what's true today - not a snapshot from last week. It's the difference between a one-time research tool and a live intelligence platform.
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