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Alien Invasion (Science Fiction, Kindle eBooks): Amazon KDP category data
Amazon Kindle eBooks Best Sellers data for Alien Invasion (Science Fiction, Kindle eBooks), updated Nov 3, 2026: median price $4.99, median 1,121 reviews, average rating 4.5 and a KDPTop opportunity score of 22/100 (highly competitive).
| Price range (middle 50%) | $1.49 – $6.99 |
|---|---|
| Average rating | 4.5 |
| New releases (90 days) | 46% |
| Books on the list | 50 |
| Store | Kindle eBooks |
What stands out
- Its median reviews are 10% of the parent category Science Fiction (11,570), one of the easier corners under it.
- 46% of its best sellers came out in the last 90 days, more than in 99% of Kindle eBooks categories: readers here keep buying new titles.
- Its review barrier is higher than in 89% of Kindle eBooks categories: the median best seller has 1,121 reviews, so new books need time to build up.
Top 10 Alien Invasion best sellers
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A Parade of Horribles: Dungeon Crawler Carl, Book 8
- List rank#1
- Price$6.99
- Rating4.8
- Reviews41,099
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I’m a Destroyer: A Sentient AI Warship Military Sci-Fi Adventure (I, Warship Book 1)
by Sean Robins
- List rank#3
- Price$0.99
- Rating4.4
- Reviews257
-
Divine Lord Interference: Rise of the Body Cultivator
by Apollos Thorne
- List rank#4
- Price$4.99
- Rating4.8
- Reviews98
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Defiance of the Fall 17: A LitRPG Adventure
- List rank#7
- Price$7.99
- Rating4.6
- Reviews1,304
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Star Map (Star Map Book One)
- List rank#9
- Price$0.99
- Rating4.6
- Reviews126
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Them: A Novel
by W.H. Chizmar
- List rank#10
- Price$14.99
- Rating4.2
- Reviews191
Same niche in Books: Alien Invasion
FAQ
Is Alien Invasion a good niche for Amazon KDP?
Its KDPTop opportunity score is 22/100, which makes it highly competitive. The median best seller has 1,121 reviews and sells for $4.99.
How many reviews do you need to rank in Alien Invasion?
The median best seller has 1,121 reviews, and 12% of them have fewer than 100.
What do Alien Invasion best sellers cost?
The median price is $4.99; half of the best sellers are priced between $1.49 and $6.99.
Can new books break into Alien Invasion?
46% 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.