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Science Fiction (Romance, Kindle eBooks): Amazon KDP category data
Amazon Kindle eBooks Best Sellers data for Science Fiction (Romance, Kindle eBooks), updated Nov 3, 2026: median price $4.99, median 2,838 reviews, average rating 4.4 and a KDPTop opportunity score of 22/100 (highly competitive).
| Price range (middle 50%) | $3.99 – $4.99 |
|---|---|
| Average rating | 4.4 |
| New releases (90 days) | 33% |
| Books on the list | 100 |
| Store | Kindle eBooks |
What stands out
- 33% of its best sellers came out in the last 90 days, more than in 96% of Kindle eBooks categories: readers here keep buying new titles.
- Its review barrier is higher than in 95% of Kindle eBooks categories: the median best seller has 2,838 reviews, so new books need time to build up.
- Its median reviews are 35% of the parent category Romance (8,220), one of the easier corners under it.
Top 10 Science Fiction best sellers
-
The Wildborn: A Sci-Fi Alien Romance (The Starborn Series Book 1)
by Perri Torani
- List rank#1
- Price$3.99
- Rating4.4
- Reviews2,266
-
Daggermouth (The Heart Duology Book 1)
by H. M. Wolfe
- List rank#2
- Price$11.99
- Rating4.6
- Reviews52,905
-
The One (Expanded Edition): The Million-Copy International Bestseller – Now with Five Chapters of Exclusive Bonus Content (Dark Future Book 1)
by John Marrs
- List rank#3
- Price$12.99
- Rating4.2
- Reviews71,851
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Variant Lost: A Paranormal Romance (The Evelyn Maynard Trilogy Book 1)
by Kaydence Snow
- List rank#6
- Price$3.99
- Rating4.4
- Reviews13,708
-
Barbarian Alien: A SciFi Alien Romance (Ice Planet Barbarians Book 2)
by Ruby Dixon
- List rank#7
- Price$3.99
- Rating4.2
- Reviews32,357
-
The Mating Games: The Complete Series Box Set: A Sci fi Alien Romance Series
by Tammy Walsh
- List rank#8
- Price$0.99
- Rating4.8
- Reviews10
-
Under the Iron Sky
by A. T. Emerald
- List rank#9
- Price$13.99
- Rating4.6
- Reviews527
-
This Is How You Lose the Time War
by Amal El-Mohtar
- List rank#10
- Price$13.99
- Rating4.2
- Reviews20,594
Same niche in Books: Science Fiction
FAQ
Is Science Fiction a good niche for Amazon KDP?
Its KDPTop opportunity score is 22/100, which makes it highly competitive. The median best seller has 2,838 reviews and sells for $4.99.
How many reviews do you need to rank in Science Fiction?
The median best seller has 2,838 reviews, and 16% of them have fewer than 100.
What do Science Fiction best sellers cost?
The median price is $4.99; half of the best sellers are priced between $3.99 and $4.99.
Can new books break into Science Fiction?
33% 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.