All 88 categories
World — Kindle Category Opportunity
Competition snapshot for the History best-seller list, vacancy score 40.0/100.
Middle
Category metrics
Score
40.0
Median reviews
885
Weak share (top 20)
20%
Median price
$10.24
Median star rating
4.6
Books scanned
50
Worth writing in?
World is between the extremes: 20% of the top 20 is under 100 reviews against a median of 885, so entry depends on the specific sub-genre and your launch strength. Read the breakout books below before judging. Vacancy score 40.0/100.
Breakout books — top 15, under 100 reviews, $0.99–4.99
Best-seller list on AmazonNo breakout books in this category.
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Research snapshot scanned on Oct 10, 2026. Refreshed periodically — not live tracking.