Engineering — Kindle Category Opportunity
Competition snapshot for the Engineering & Transportation best-seller list, ease-of-entry score 51.0/100.
Category metrics
Score
51.0
Median reviews
527
Weak share (top 20)
40%
Median price
$9.54
Median star rating
4.5
Books scanned
50
Worth writing in?
The Engineering list shows real reader demand with room left for newcomers: the median book carries 527 reviews, yet 40% 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 51.0/100.
Breakout books — top 15, under 100 reviews, $0.99–4.99
Best-seller list on Amazon| # | Title | Star | Reviews | Price |
|---|---|---|---|---|
| 4 | Path to Singularity: How Technology Will Challenge the Future of Humanity | 4.4 | 12 | $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 | 108 |
| october 2026 | 2 | 76 |
| artificial intelligence | 3 | 74 |
| future of humanity | 2 | 57 |
| world greatest | 2 | 42 |
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More Engineering & Transportation categories
13 subcategories under this category
| Subcategory | Score | Median reviews |
|---|---|---|
| █████ | 69.0 | 2 |
| █████ | 67.0 | 6.5 |
| █████ | 59.5 | 7.5 |
| █████ | 58.0 | 59 |
| █████ | 57.0 | 8.5 |
| █████ | 53.5 | 31 |
| █████ | 53.5 | 33 |
| █████ | 52.5 | 6 |
| █████ | 49.5 | 181 |
| █████ | 48.5 | 66 |
| █████ | 48.0 | 110 |
| █████ | 47.0 | 138 |
| █████ | 46.0 | 243.5 |
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.