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Space Opera (Science Fiction & Fantasy › Science Fiction, Kindle eBooks): Amazon KDP category data
Amazon Kindle eBooks Best Sellers data for Space Opera (Science Fiction & Fantasy › Science Fiction, Kindle eBooks), updated Nov 3, 2026: median price $4.99, median 1,585 reviews, average rating 4.5 and a KDPTop opportunity score of 28/100 (highly competitive).
| Price range (middle 50%) | $3.99 – $9.99 |
|---|---|
| Average rating | 4.5 |
| New releases (90 days) | 44% |
| Books on the list | 100 |
| Store | Kindle eBooks |
What stands out
- 44% of its best sellers came out in the last 90 days, more than in 98% of Kindle eBooks categories: readers here keep buying new titles.
- Its median reviews are 14% of the parent category Science Fiction (11,570), one of the easier corners under it.
- Its review barrier is higher than in 92% of Kindle eBooks categories: the median best seller has 1,585 reviews, so new books need time to build up.
Top 10 Space Opera best sellers
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Privateer's Commission 3
by Randi Darren
- List rank#3
- Price$4.99
- Rating5.0
- Reviews44
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The Caves of Steel (The Robot Series Book 1)
by Isaac Asimov
- List rank#5
- Price$2.99
- Rating4.5
- Reviews11,552
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Lieutenant Year 8 (An Officer of the Union Space Fleet)
by Joe Durham
- List rank#6
- Price$3.99
- Rating4.3
- Reviews102
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Alien Clay
- List rank#7
- Price$1.99
- Rating4.3
- Reviews8,295
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Children of Time
- List rank#9
- Price$9.99
- Rating4.5
- Reviews51,769
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Star Wars Trilogy
by George Lucas
- List rank#10
- Price$2.99
- Rating4.7
- Reviews2,309
Same niche in Books: Space Opera
FAQ
Is Space Opera a good niche for Amazon KDP?
Its KDPTop opportunity score is 28/100, which makes it highly competitive. The median best seller has 1,585 reviews and sells for $4.99.
How many reviews do you need to rank in Space Opera?
The median best seller has 1,585 reviews, and 19% of them have fewer than 100.
What do Space Opera best sellers cost?
The median price is $4.99; half of the best sellers are priced between $3.99 and $9.99.
Can new books break into Space Opera?
44% 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.