Security & Encryption — Kindle Category Opportunity
Competition snapshot for the Computers & Technology best-seller list, vacancy score 45.0/100.
Category metrics
Score
45.0
Median reviews
185.5
Weak share (top 20)
30%
Median price
$15.99
Median star rating
4.6
Books scanned
50
Worth writing in?
The Security & Encryption list shows real reader demand with room left for newcomers: the median book carries 185.5 reviews, yet 30% of the top 20 still sit under 100 reviews. 0 top-15 books hold fewer than 100 reviews at $0.99–4.99 — the classic self-publishing breakout band. Vacancy score 45.0/100.
Breakout books — top 15, under 100 reviews, $0.99–4.99
Best-seller list on AmazonNo breakout books in this category.
More Computers & Technology categories
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Research snapshot scanned on Oct 10, 2026. Refreshed periodically — not live tracking.