Safety & First Aid — Kindle Category Opportunity
Competition snapshot for the Health, Fitness & Dieting best-seller list, ease-of-entry score 41.0/100.
Category metrics
Score
41.0
Median reviews
105.5
Weak share (top 20)
20%
Median price
$7.99
Median star rating
4.6
Books scanned
50
Worth writing in?
Safety & First Aid is between the extremes: 20% of the top 20 is under 100 reviews against a median of 105.5, so entry depends on the specific sub-genre and your launch strength. Read the breakout books below before judging. Ease-of-entry score 41.0/100.
Breakout books — top 15, under 100 reviews, $0.99–4.99
Best-seller list on Amazon| # | Title | Star | Reviews | Price |
|---|---|---|---|---|
| 9 | The Prepper’s Encyclopedia: The Survival Master Bible - Everything You Need to Survive Any Apocalyptic Scenario and Keep Your Family Safe | 4.3 | 24 | $0.99 |
High-frequency phrases in this category's titles
Mine all categoriesHigh-frequency phrases mined from the 50 best-seller titles on this category's list. The ease-of-entry score tells you how winnable the category is; these title phrases tell you which words readers search with — use the two layers together. Frequency is a title statistic, not a search-volume estimate.
| Phrase | Titles | Rank-weighted score |
|---|---|---|
| self defense | 5 | 116 |
| practical guide | 3 | 84 |
| survival handbook | 2 | 82 |
| guide to surviving | 2 | 78 |
| ultimate guide | 3 | 76 |
| everything you need | 2 | 71 |
| real world | 2 | 68 |
| long term | 2 | 56 |
| 100 deadly skills | 2 | 52 |
| seal operative guide | 2 | 52 |
| protect yourself | 3 | 50 |
| guide to self | 2 | 46 |
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Category research picks the direction; review diagnosis reads the readers. The same platform clusters a book's critical reviews into severity-ranked root causes, each anchored to verbatim quotes — see it applied to a full narrative-history title.
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Research snapshot scanned on Oct 19, 2026. Refreshed periodically — not live tracking.