Catalogs & Directories — Kindle Category Opportunity
Competition snapshot for the Reference best-seller list, ease-of-entry score 77.0/100.
Category metrics
Score
77.0
Median reviews
41
Weak share (top 20)
80%
Median price
$6.99
Median star rating
4.5
Books scanned
50
Worth writing in?
Catalogs & Directories sits below our demand gate: 80% of the top 20 is under-reviewed, but overall reader activity is thin too. It can be a quiet corner to build in slowly — validate demand with keyword lookups before committing a series. Ease-of-entry score 77.0/100.
Breakout books — top 15, under 100 reviews, $0.99–4.99
Best-seller list on Amazon| # | Title | Star | Reviews | Price |
|---|---|---|---|---|
| 10 | Electronic Components Part Number Directory: A Practical Reference of Common Component Part Numbers, Families, Specs, Uses, and Replacement Notes (Electronic ... Part Number Reference Series Book 2) | 5.0 | 1 | $4.99 |
| 12 | R Cheat Sheet, Syntax Table & Chart, Complete Reference Guide by Examples: R Language Syntax Book, Cover all Basic R Syntaxes, Quick Study Workbook (Cheat Sheet Series) | 5.0 | 1 | $2.99 |
| 4 | NORA ROBERTS BOOKS IN ORDER | 3.9 | 6 | $3.99 |
| 6 | A Greek-English Lexicon | 4.1 | 23 | $2.99 |
| 11 | Master Business Vocabulary & Terminology: Business English in Use: Essential Terms, Wording & Idioms: for Work Meetings, Business Plans, Contracts, Reports, ... Speaking, Writing, and Vocabulary Books) | 3.9 | 45 | $3.99 |
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 |
|---|---|---|
| mythical creatures bestiary | 3 | 94 |
| bartlett familiar quotations | 2 | 83 |
| literary agents | 2 | 79 |
| summaries and checklist | 2 | 70 |
| trusted guide | 2 | 40 |
| great britain classic | 2 | 39 |
| rare stamp experts | 2 | 39 |
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More Reference categories
2 subcategories under this category
| Subcategory | Score | Median reviews |
|---|---|---|
| █████ | 89.0 | 3 |
| █████ | 70.0 | 49 |
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.