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Certification, Training & Reference — Kindle Category Opportunity
Competition snapshot for the Computers & Technology best-seller list, vacancy score 48.5/100.
MiddleStagnant
Category metrics
Score
48.5
Median reviews
46.5
Weak share (top 20)
35%
Median price
$12.99
Median star rating
4.6
Books scanned
50
Worth writing in?
Certification, Training & Reference sits below our demand gate: 35% of the top 20 is under-reviewed, but overall reader activity is thin too. It can be a quiet corner to build in slowly — validate demand with keyword lookups before committing a series. Vacancy score 48.5/100.
Breakout books — top 15, under 100 reviews, $0.99–4.99
Best-seller list on Amazon| # | Title | Star | Reviews | Price |
|---|---|---|---|---|
| 8 | CompTIA Network+ N10-009 Last Minute Cram | 4.6 | 53 | $0.99 |
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Research snapshot scanned on Oct 10, 2026. Refreshed periodically — not live tracking.