KDP categories · Top KDP authors
UFOs (Astronomy & Space Science, Kindle eBooks): Amazon KDP category data
Amazon Kindle eBooks Best Sellers data for UFOs (Astronomy & Space Science, Kindle eBooks), updated Nov 3, 2026: median price $9.97, median 291 reviews, average rating 4.4 and a KDPTop opportunity score of 24/100 (highly competitive).
| Price range (middle 50%) | $4.74 – $9.99 |
|---|---|
| Average rating | 4.4 |
| New releases (90 days) | 6% |
| Books on the list | 100 |
| Store | Kindle eBooks |
What stands out
- Its median reviews are 48% of the parent category Astronomy & Space Science (610), one of the easier corners under it.
- Its review barrier is higher than in 73% of Kindle eBooks categories: the median best seller has 291 reviews, so new books need time to build up.
Top 10 UFOs best sellers
-
Out of the Shadows: Revealing the Truth About Non-Human Intelligent Life
by Jay Stratton
- List rank#1
- Price$14.99
- Rating4.5
- Reviews890
-
Visitor
by Craig A. Falconer
- List rank#2
- Price$0.99
- Rating4.4
- Reviews1,000
-
Starblade’s Legacy: An Epic Space Opera/Alien Invasion Adventure (Renegades of the Void Book 3)
by Sean Robins
- List rank#3
- Price$0.99
- Rating4.3
- Reviews30
-
Behold a Pale Horse
by Milton William Cooper
- List rank#4
- Price$9.99
- Rating4.7
- Reviews13,885
-
The Woods Behind Our Home: Chilling True Stories
by Tom Lyons
- List rank#5
- Price$3.99
- Rating4.3
- Reviews256
-
Skinwalkers at the Pentagon: An Insiders' Account of the Secret Government UFO Program
by Colm A. Kelleher
- List rank#6
- Price$9.95
- Rating4.4
- Reviews3,159
-
Emergence: An Apocalyptic Alien Invasion (Command & Control Book 1)
by JK Franks
- List rank#7
- Price$6.99
- Rating4.4
- Reviews379
-
Communion
by Whitley Strieber
- List rank#8
- Price$8.99
- Rating4.2
- Reviews1,517
-
Not Alone
by Craig A. Falconer
- List rank#9
- Price$0.99
- Rating4.2
- Reviews11,664
-
Aliens Among Us: They're Not Aliens - They're Not Human: The Cryptoterrestrials and the Origins of UAP
by Greg Pasden
- List rank#10
- Price$3.69
- Rating4.2
- Reviews305
Same niche in Books: UFOs
FAQ
Is UFOs a good niche for Amazon KDP?
Its KDPTop opportunity score is 24/100, which makes it highly competitive. The median best seller has 291 reviews and sells for $9.97.
How many reviews do you need to rank in UFOs?
The median best seller has 291 reviews, and 27% of them have fewer than 100.
What do UFOs best sellers cost?
The median price is $9.97; half of the best sellers are priced between $4.74 and $9.99.
Can new books break into UFOs?
6% 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.