Physics — Kindle Category Opportunity
Competition snapshot for the Science & Math best-seller list, ease-of-entry score 59.5/100.
Category metrics
Score
59.5
Median reviews
389.5
Weak share (top 20)
55%
Median price
$6.99
Median star rating
4.5
Books scanned
50
Worth writing in?
The Physics list shows real reader demand with room left for newcomers: the median book carries 389.5 reviews, yet 55% 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 59.5/100.
Breakout books — top 15, under 100 reviews, $0.99–4.99
Best-seller list on Amazon| # | Title | Star | Reviews | Price |
|---|---|---|---|---|
| 3 | Systems Thinking for Work: How Leaders, Managers, and Professionals Solve Complex Problems, Avoid Costly Mistakes, and Make Smarter Decisions. (The Systems Thinker Series Book 8) | — | 0 | $0.99 |
| 10 | Super Structures: The Science of Bridges, Buildings, Dams, and Other Feats of Engineering | 4.3 | 18 | $1.99 |
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 | 3 | 123 |
| quantum physics | 2 | 67 |
| brief history | 4 | 66 |
| general theory | 2 | 20 |
| special and the general | 2 | 20 |
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More Science & Math categories
19 subcategories under this category
| Subcategory | Score | Median reviews |
|---|---|---|
| █████ | 75.0 | 6 |
| █████ | 72.5 | 11.5 |
| █████ | 72.5 | 10 |
| █████ | 70.5 | 13.5 |
| █████ | 69.5 | 22 |
| █████ | 67.0 | 8.5 |
| █████ | 67.0 | 5 |
| █████ | 67.0 | 7.5 |
| █████ | 63.5 | 56 |
| █████ | 63.0 | 20.5 |
| █████ | 57.5 | 62.5 |
| █████ | 57.0 | 34 |
| █████ | 56.0 | 73 |
| █████ | 55.0 | 35 |
| █████ | 53.5 | 79 |
| █████ | 53.5 | 62 |
| █████ | 53.0 | 192 |
| █████ | 47.5 | 127 |
| █████ | 40.0 | 239 |
Subcategory names are visible after sign-in — a free account unlocks every subcategory score.
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Research snapshot scanned on Oct 19, 2026. Refreshed periodically — not live tracking.