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Space Fleet (Military, Books): Amazon KDP category data
Amazon Books Best Sellers data for Space Fleet (Military, Books), updated Nov 3, 2026: median price $4.99, median 832 reviews, average rating 4.5 and a KDPTop opportunity score of 31/100 (highly competitive).
| Price range (middle 50%) | $3.99 – $7.99 |
|---|---|
| Average rating | 4.5 |
| New releases (90 days) | 52% |
| Books on the list | 100 |
| Store | Books |
What stands out
- 52% of its best sellers came out in the last 90 days, more than in 99% of Books categories: readers here keep buying new titles.
- At $4.99 its median price is below 99% of Books categories, so it is a volume game.
- Its review barrier is higher than in 83% of Books categories: the median best seller has 832 reviews, so new books need time to build up.
Top 10 Space Fleet best sellers
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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#4
- Price$0.99
- Rating4.4
- Reviews257
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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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We Are Legion (We Are Bob) (Bobiverse Book 1)
by Dennis Taylor
- List rank#7
- Price$9.99
- Rating4.5
- Reviews35,050
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Light Bringer: A Red Rising Novel (Red Rising Series)
by Pierce Brown
- List rank#8
- Price$16.53
- Rating4.9
- Reviews30,763
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Ensign Year 1 (An Officer of the Union Space Fleet)
by Joe Durham
- List rank#10
- Price$2.99
- Rating4.4
- Reviews1,962
Same niche in Kindle eBooks: Space Fleet
FAQ
Is Space Fleet a good niche for Amazon KDP?
Its KDPTop opportunity score is 31/100, which makes it highly competitive. The median best seller has 832 reviews and sells for $4.99.
How many reviews do you need to rank in Space Fleet?
The median best seller has 832 reviews, and 20% of them have fewer than 100.
What do Space Fleet 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 Space Fleet?
52% 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.