Diseases — Kindle Category Opportunity
Competition snapshot for the Medical eBooks best-seller list, ease-of-entry score 44.5/100.
Category metrics
Score
44.5
Median reviews
642.5
Weak share (top 20)
25%
Median price
$9.43
Median star rating
4.6
Books scanned
50
Worth writing in?
The Diseases list shows real reader demand with room left for newcomers: the median book carries 642.5 reviews, yet 25% of the top 20 still sit under 100 reviews. 2 top-15 books hold fewer than 100 reviews at $0.99–4.99 — classic self-publishing breakout books. Ease-of-entry score 44.5/100.
Breakout books — top 15, under 100 reviews, $0.99–4.99
Best-seller list on Amazon| # | Title | Star | Reviews | Price |
|---|---|---|---|---|
| 6 | Tai Chi & Chair Yoga for Seniors Over 60: Prevent Falling and Start Living: 10-Minute Seated Flows to Rebuild Balance, Ease Joint Pain, and Regain Independence | 4.7 | 50 | $0.99 |
| 12 | Fix Your Insulin: 7 Simple Hacks to Lose Weight Without Hunger or Calorie Counting | 4.8 | 57 | $4.99 |
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 |
|---|---|---|
| insulin resistance | 3 | 78 |
| lose weight | 2 | 64 |
| type diabetes | 3 | 60 |
| reverse insulin resistance | 2 | 57 |
| medical mystery | 2 | 53 |
| seniors over 60 | 2 | 51 |
| proven plan | 2 | 37 |
| prevent and reverse | 2 | 36 |
| blood sugar | 2 | 27 |
| diabetic diet cookbook | 2 | 27 |
| recipes to support | 2 | 27 |
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More Medical eBooks categories
6 subcategories under this category
| Subcategory | Score | Median reviews |
|---|---|---|
| █████ | 87.0 | 2.5 |
| █████ | 80.0 | 10.5 |
| █████ | 73.5 | 10.5 |
| █████ | 69.0 | 8 |
| █████ | 64.5 | 27 |
| █████ | 62.0 | 34 |
Subcategory names are visible after sign-in — a free account unlocks every subcategory score.
Sign up free to unlockCheck the keywords before you write
Category scores show where entry is easiest; keyword lookups show whether readers actually reach for it. A free account includes keyword competition lookups plus unlimited category scans.
After you publish: why aren't readers buying?
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.
Keep researching with the free tools
Research snapshot scanned on Oct 19, 2026. Refreshed periodically — not live tracking.