Sexual Instruction — Kindle Category Opportunity
Competition snapshot for the Self-Help best-seller list, ease-of-entry score 40.0/100.
Category metrics
Score
40.0
Median reviews
181.5
Weak share (top 20)
20%
Median price
$9.97
Median star rating
4.4
Books scanned
50
Worth writing in?
Sexual Instruction is between the extremes: 20% of the top 20 is under 100 reviews against a median of 181.5, 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 |
|---|---|---|
| sex positions | 10 | 274 |
| complete guide to sexual | 5 | 181 |
| sex bible | 4 | 143 |
| ultimate guide | 4 | 113 |
| guide to sexual love | 3 | 104 |
| kama sutra | 6 | 99 |
| sex life | 4 | 99 |
| sex positions with pictures | 3 | 82 |
| man guide | 2 | 78 |
| guide to pleasuring | 2 | 76 |
| practical guide | 2 | 74 |
| new sex bible | 2 | 72 |
Sign in and click any phrase to send it straight to the keyword competition lookup.
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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.