Reference — Kindle Category Opportunity
Competition snapshot for the Parenting & Relationships best-seller list, ease-of-entry score 12.0/100.
Category metrics
Score
12.0
Median reviews
667
Weak share (top 20)
20%
Median price
$9.99
Median star rating
4.6
Books scanned
50
Worth writing in?
Reference is between the extremes: 20% of the top 20 is under 100 reviews against a median of 667, so entry depends on the specific sub-genre and your launch strength. Read the breakout books below before judging. Ease-of-entry score 12.0/100.
Breakout books — top 15, under 100 reviews, $0.99–4.99
Best-seller list on Amazon| # | Title | Star | Reviews | Price |
|---|---|---|---|---|
| 15 | The Complete Book of Baby Names For Girls: Meanings, Origins, and Inspiration to Help You Choose the Perfect Name for Your Daughter (Baby Names Reference Guides) | 4.2 | 7 | $4.99 |
| 11 | The Complete Book Of Baby Names For Boys: Meanings, Origins, and Inspiration to Help You Choose the Perfect Name for Your Son (Baby Names Reference Guides) | 4.5 | 9 | $4.99 |
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 |
|---|---|---|
| parent guide | 4 | 155 |
| first year | 3 | 100 |
| parent guide to raising | 2 | 81 |
| baby names | 2 | 76 |
| choose the perfect name | 2 | 76 |
| complete book of baby | 2 | 76 |
| help you choose | 2 | 76 |
| inspiration to help | 2 | 76 |
| meanings origins and inspiration | 2 | 76 |
| woman guide | 2 | 62 |
| attract women | 2 | 55 |
| guide to understanding | 2 | 54 |
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Check 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.