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21st Century (Teens › Historical Fiction › United States, Books): Amazon KDP category data
Amazon Books Best Sellers data for 21st Century (Teens › Historical Fiction › United States, Books), updated Nov 2, 2026: median price $12.62, median 7 reviews, average rating 4.5 and a KDPTop opportunity score of 20/100 (highly competitive).
| Price range (middle 50%) | $10 – $16 |
|---|---|
| Average rating | 4.5 |
| New releases (90 days) | 2% |
| Books on the list | 99 |
| Store | Books |
What stands out
- Its median reviews are 1% of the parent category United States (852), one of the easier corners under it.
- Only 2% of its best sellers are under 90 days old, fewer than in 89% of Books categories: established titles hold the list.
- Its review barrier is lower than in 87% of Books categories: the median best seller has only 7 reviews, so new books can chart with few.
Top 10 21st Century best sellers
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Under the Blood-Red Sun (Prisoners of the Empire Series)
by Graham Salisbury
- List rank#3
- Price$9.49
- Rating4.6
- Reviews253
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The Memory of Things: A Novel
by Gae Polisner
- List rank#4
- Price$15
- Rating4.4
- Reviews267
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Look. Judge. Repeat
by Rebecca M. Kinney
- List rank#5
- Price$10.81
- Rating5.0
- Reviews1
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Lair of Dreams: A Diviners Novel (The Diviners Book 2)
by Libba Bray
- List rank#6
- Price$9.99
- Rating4.5
- Reviews1,382
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The Last Full Measure (Divided We Fall, Book 3) (3)
by Trent Reedy
- List rank#7
- Price$72.99
- Rating4.7
- Reviews222
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Sunrise Over Fallujah
- List rank#8
- Price$6.20
- Rating4.4
- Reviews314
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All We Have Left
by Wendy Mills
- List rank#9
- Price$7.80
- Rating4.6
- Reviews362
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House of the Red Fish (Prisoners of the Empire Series)
by Graham Salisbury
- List rank#10
- Price$6.99
- Rating4.7
- Reviews63
FAQ
Is 21st Century a good niche for Amazon KDP?
Its KDPTop opportunity score is 20/100, which makes it highly competitive. The median best seller has 7 reviews and sells for $12.62.
How many reviews do you need to rank in 21st Century?
The median best seller has 7 reviews, and 78% of them have fewer than 100.
What do 21st Century best sellers cost?
The median price is $12.62; half of the best sellers are priced between $10 and $16.
Can new books break into 21st Century?
2% of the current best sellers were released in the last 90 days.
About this data
Data comes from KDPTop's daily crawl of Amazon's public Best Sellers pages; medians use the latest list. The opportunity score (0–100, higher is easier to enter) combines the review barrier, the share of low-review books, list turnover, new-release share and price.