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View book metadata, BSR, and royalty estimates on Amazon product pages Easy Keywords is a powerful research tool for Amazon book sellers, KDP self publishers, and authors who want to analyze book competition and market opportunity at a glance — without leaving Amazon. Whether you're researching a niche, validating a book idea, or scouting bestsellers, Easy Keywords overlays the data that matters directly onto Amazon product pages and search results.
rating_count is the Chrome Web Store ratings count, not a written-review count.