Basic Science — Kindle Category Opportunity
Competition snapshot for the Medical eBooks best-seller list, ease-of-entry score 42.5/100.
Category metrics
Score
42.5
Median reviews
1,397.5
Weak share (top 20)
25%
Median price
$11.69
Median star rating
4.5
Books scanned
50
Worth writing in?
The Basic Science list shows real reader demand with room left for newcomers: the median book carries 1397.5 reviews, yet 25% of the top 20 still sit under 100 reviews. 0 top-15 books hold fewer than 100 reviews at $0.99–4.99 — classic self-publishing breakout books. Ease-of-entry score 42.5/100.
Breakout books — top 15, under 100 reviews, $0.99–4.99
Best-seller list on AmazonNo breakout books in this category.
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 |
|---|---|---|
| scientific american | 3 | 118 |
| new science | 2 | 45 |
| cognitive decline | 2 | 19 |
Sign in and click any phrase to send it straight to the keyword competition lookup.
More Medical eBooks categories
10 subcategories under this category
| Subcategory | Score | Median reviews |
|---|---|---|
| █████ | 81.5 | 9.5 |
| █████ | 75.5 | 5 |
| █████ | 74.5 | 23.5 |
| █████ | 73.0 | 30 |
| █████ | 65.0 | 63 |
| █████ | 57.5 | 45 |
| █████ | 43.5 | 137 |
| █████ | 42.5 | 1833 |
| █████ | 38.5 | 124.5 |
| █████ | 22.0 | 81.5 |
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.