Chemistry — Kindle Category Opportunity
Competition snapshot for the Science & Math best-seller list, ease-of-entry score 48.5/100.
Category metrics
Score
48.5
Median reviews
100
Weak share (top 20)
35%
Median price
$7.49
Median star rating
4.5
Books scanned
50
Worth writing in?
The Chemistry list shows real reader demand with room left for newcomers: the median book carries 100 reviews, yet 35% of the top 20 still sit under 100 reviews. 1 top-15 books hold fewer than 100 reviews at $0.99–4.99 — classic self-publishing breakout books. Ease-of-entry score 48.5/100.
Breakout books — top 15, under 100 reviews, $0.99–4.99
Best-seller list on Amazon| # | Title | Star | Reviews | Price |
|---|---|---|---|---|
| 5 | It's a Gas: The Sublime and Elusive Elements That Expand Our World – The Secret Lives of Twelve Gases That Shaped Human Civilization | 4.3 | 98 | $2.99 |
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 |
|---|---|---|
| scientific american | 7 | 200 |
| periodic table | 2 | 70 |
| organic chemistry | 4 | 61 |
| beginner guide | 2 | 59 |
| study guide | 2 | 49 |
| 21st century | 2 | 44 |
| bestselling popular science | 2 | 44 |
| everything the bestselling popular | 2 | 44 |
| history of nearly everything | 2 | 44 |
| nearly everything the bestselling | 2 | 44 |
| short history of nearly | 2 | 44 |
| new science | 2 | 38 |
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More Science & Math categories
8 subcategories under this category
| Subcategory | Score | Median reviews |
|---|---|---|
| █████ | 76.5 | 9.5 |
| █████ | 72.5 | 9 |
| █████ | 72.0 | 22.5 |
| █████ | 68.5 | 5 |
| █████ | 67.5 | 7.5 |
| █████ | 64.0 | 54.5 |
| █████ | 58.5 | 64 |
| █████ | 56.0 | 17 |
Subcategory names are visible after sign-in — a free account unlocks every subcategory score.
Sign up free to unlockCheck the keywords before you write
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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.