All 88 categories
Mysteries & Detectives — Kindle Category Opportunity
Competition snapshot for the Children's eBooks best-seller list, vacancy score 36.0/100.
Fortress
Category metrics
Score
36.0
Median reviews
4,063
Weak share (top 20)
10%
Median price
$6.99
Median star rating
4.6
Books scanned
50
Worth writing in?
Mysteries & Detectives is defended territory: incumbents are deep-reviewed and the top 20 rarely cracks. New releases can still chart with ads or a launch push, but expect to climb over established authors rather than around them. Vacancy score 36.0/100.
Breakout books — top 15, under 100 reviews, $0.99–4.99
Best-seller list on Amazon| # | Title | Star | Reviews | Price |
|---|---|---|---|---|
| 7 | Mission in Mount Rainier National Park (National Park Mystery Series Book 6) | 5.0 | 62 | $2.99 |
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Research snapshot scanned on Oct 10, 2026. Refreshed periodically — not live tracking.