Biological Sciences — Kindle Category Opportunity
Competition snapshot for the Science & Math best-seller list, ease-of-entry score 36.0/100.
Category metrics
Score
36.0
Median reviews
1,729.5
Weak share (top 20)
10%
Median price
$5.99
Median star rating
4.6
Books scanned
50
Worth writing in?
Biological Sciences is heavily defended: incumbents are deep-reviewed and the top 20 rarely cracks. New releases can still chart with ads or a launch push, but expect to climb over established authors rather than around them. Ease-of-entry score 36.0/100.
Breakout books — top 15, under 100 reviews, $0.99–4.99
Best-seller list on Amazon| # | Title | Star | Reviews | Price |
|---|---|---|---|---|
| 8 | Honey: Recipes From a Beekeeper's Kitchen | 4.5 | 61 | $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 |
|---|---|---|
| human body | 2 | 85 |
| new science | 3 | 82 |
| scientific american | 3 | 82 |
| north america | 2 | 58 |
| new history | 2 | 46 |
| life on earth | 2 | 37 |
| beginner guide | 2 | 33 |
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More Science & Math categories
11 subcategories under this category
| Subcategory | Score | Median reviews |
|---|---|---|
| █████ | 71.0 | 9 |
| █████ | 56.0 | 926.5 |
| █████ | 50.0 | 165 |
| █████ | 48.5 | 65 |
| █████ | 47.5 | 101 |
| █████ | 46.0 | 73 |
| █████ | 46.0 | 106 |
| █████ | 46.0 | 471 |
| █████ | 42.5 | 975 |
| █████ | 37.5 | 1652 |
| █████ | 11.0 | 490.5 |
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.
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Research snapshot scanned on Oct 19, 2026. Refreshed periodically — not live tracking.