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Aliens (Children's eBooks › Science Fiction, Kindle eBooks): Amazon KDP category data
Amazon Kindle eBooks Best Sellers data for Aliens (Children's eBooks › Science Fiction, Kindle eBooks), updated Nov 2, 2026: median price $4.99, median 75 reviews, average rating 4.6 and a KDPTop opportunity score of 21/100 (highly competitive).
| Price range (middle 50%) | $3.99 – $7.99 |
|---|---|
| Average rating | 4.6 |
| New releases (90 days) | 7% |
| Books on the list | 100 |
| Store | Kindle eBooks |
What stands out
- Its median reviews are 4% of the parent category Science Fiction (2,066), one of the easier corners under it.
- At $4.99 its median price is below 91% of Kindle eBooks categories, so it is a volume game.
Top 10 Aliens best sellers
-
Out of This World
- List rank#1
- Price$4.95
- Rating4.2
- Reviews760
-
The Experiment
by Rebecca Stead
- List rank#2
- Price$10.99
- Rating4.5
- Reviews81
-
Trouble On Planet Earth (Choose Your Own Adventure Book 11)
- List rank#3
- Price$2.99
- Rating4.3
- Reviews21
-
Cryptid Chronicles: Mothman (Choose Your Own Adventure New Classics Book 6)
by Cristin Bishara
- List rank#4
- Price$7.40
- Rating4.7
- Reviews66
-
Ben Archer and the Cosmic Fall (The Alien Skill Series, Book 1): Sci-Fi Adventure for Teens
by Rae Knightly
- List rank#5
- Price$2.99
- Rating4.6
- Reviews1,633
-
Trapped (The Prometheus Project Book 1)
- List rank#6
- Price$0.99
- Rating4.4
- Reviews2,022
-
-
The Hitchhiker's Guide to the Galaxy Illustrated Edition
- List rank#8
- Price-
- Rating4.3
- Reviews30,921
-
My Alien Parents
by R.L. Stine
- List rank#9
- Price$3.99
- Rating4.2
- Reviews380
-
The Alien Next Door 13: The Bad Luck House
by A.I. Newton
- List rank#10
- Price$5.99
- Rating5.0
- Reviews4
FAQ
Is Aliens a good niche for Amazon KDP?
Its KDPTop opportunity score is 21/100, which makes it highly competitive. The median best seller has 75 reviews and sells for $4.99.
How many reviews do you need to rank in Aliens?
The median best seller has 75 reviews, and 56% of them have fewer than 100.
What do Aliens best sellers cost?
The median price is $4.99; half of the best sellers are priced between $3.99 and $7.99.
Can new books break into Aliens?
7% 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.