Transportation — Kindle Category Opportunity
Competition snapshot for the Engineering & Transportation best-seller list, ease-of-entry score 40.0/100.
Category metrics
Score
40.0
Median reviews
1,120.5
Weak share (top 20)
20%
Median price
$9.46
Median star rating
4.5
Books scanned
50
Worth writing in?
Transportation is between the extremes: 20% of the top 20 is under 100 reviews against a median of 1120.5, so entry depends on the specific sub-genre and your launch strength. Read the breakout books below before judging. Ease-of-entry score 40.0/100.
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 |
|---|---|---|
| luke angel | 4 | 104 |
| hindenburg disaster | 2 | 72 |
| car and driver | 3 | 67 |
| world war | 2 | 56 |
| luke angel mystery | 2 | 51 |
Sign in and click any phrase to send it straight to the keyword competition lookup.
More Engineering & Transportation categories
6 subcategories under this category
| Subcategory | Score | Median reviews |
|---|---|---|
| █████ | 81.5 | 1 |
| █████ | 75.0 | 20 |
| █████ | 66.0 | 36.5 |
| █████ | 59.5 | 31.5 |
| █████ | 45.0 | 201 |
| █████ | 3.5 | 499.5 |
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.