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Alien Invasion (Science Fiction, Books): Amazon KDP category data
Amazon Books Best Sellers data for Alien Invasion (Science Fiction, Books), updated Nov 3, 2026: median price $16.45, median 6,583 reviews, average rating 4.5 and a KDPTop opportunity score of 25/100 (highly competitive).
| Price range (middle 50%) | $4.74 – $26.04 |
|---|---|
| Average rating | 4.5 |
| New releases (90 days) | 19% |
| Books on the list | 100 |
| Store | Books |
What stands out
- Its review barrier is higher than in 98% of Books categories: the median best seller has 6,583 reviews, so new books need time to build up.
- Its median reviews are 21% of the parent category Science Fiction (30,843), one of the easier corners under it.
- 19% of its best sellers came out in the last 90 days, more than in 89% of Books categories: readers here keep buying new titles.
Top 10 Alien Invasion best sellers
-
The Eye of the Bedlam Bride: Dungeon Crawler Carl Book 6
- List rank#1
- Price$5.99
- Rating4.8
- Reviews67,936
-
A Parade of Horribles: Dungeon Crawler Carl, Book 8
- List rank#2
- Price$6.99
- Rating4.8
- Reviews41,099
-
We Are Legion (We Are Bob): Bobiverse, Book 1
- List rank#3
- Price$17.99
- Rating4.5
- Reviews35,050
-
-
Children of Time: Children of Time, Book 1
- List rank#5
- Price$21.99
- Rating4.5
- Reviews51,769
-
All These Worlds: Bobiverse, Book 3
- List rank#6
- Price$17.38
- Rating4.6
- Reviews23,914
-
Empire of Silence: Sun Eater, Book 1
- List rank#7
- Price$26.95
- Rating4.4
- Reviews11,710
-
-
The Three-Body Problem
by Cixin Liu
- List rank#9
- Price$21.59
- Rating4.4
- Reviews54,178
-
I’m a Destroyer: A Sentient AI Warship Military Sci-Fi Adventure (I, Warship Book 1)
by Sean Robins
- List rank#10
- Price$0.99
- Rating4.4
- Reviews257
Same niche in Kindle eBooks: Alien Invasion
FAQ
Is Alien Invasion a good niche for Amazon KDP?
Its KDPTop opportunity score is 25/100, which makes it highly competitive. The median best seller has 6,583 reviews and sells for $16.45.
How many reviews do you need to rank in Alien Invasion?
The median best seller has 6,583 reviews, and 3% of them have fewer than 100.
What do Alien Invasion best sellers cost?
The median price is $16.45; half of the best sellers are priced between $4.74 and $26.04.
Can new books break into Alien Invasion?
19% 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.