KDP categories · Top KDP authors
Universe: Amazon KDP category data
Amazon Kindle eBooks Best Sellers data for Universe, updated Nov 3, 2026: median price $4.99, median 2 reviews, average rating 4.4 and a KDPTop opportunity score of 22/100 (highly competitive).
| Price range (middle 50%) | $2.99 – $7.99 |
|---|---|
| Average rating | 4.4 |
| New releases (90 days) | 19% |
| Books on the list | 100 |
| Store | Kindle eBooks |
What stands out
- Its median reviews are 0% of the parent category Astronomy & Space Science (610), one of the easier corners under it.
- Its review barrier is lower than in 93% of Kindle eBooks categories: the median best seller has only 2 reviews, so new books can chart with few.
- At $4.99 its median price is below 91% of Kindle eBooks categories, so it is a volume game.
Top 10 Universe best sellers
-
The Origin Of The Universe: Science Masters Series
by John D Barrow
- List rank#1
- Price$1.99
- Rating4.5
- Reviews23
-
Astronomy Explained for Non-Scientists: How the Universe Works From Stars and Planets to Space and Time (Science Concepts Explained for Non Scientists: Clear Guides to How the World Works)
- List rank#2
- Price$2.99
- Rating4.6
- Reviews6
-
How Elon Musk and SpaceX Want to Take AI Into Space: Data Centers in Orbit: the Million Satellites, AI1, Starship, Costs, Risks and Criticism, Explained with Full-Color Diagrams
by R. M.D
- List rank#3
- Price$2.99
- Rating5.0
- Reviews1
-
The Block Universe: How Einstein’s Physics Proves Past, Present, and Future Are Illusions and Why Your Destiny is Already Written
by ABHIJEET SARKAR
- List rank#4
- Price$0.49
- Rating5.0
- Reviews5
-
Why Aliens Won't Stop at Earth for Gas: Are We Alone in The Universe?
by Ronald Glensor
- List rank#5
- Price$6.99
- Rating4.4
- Reviews6
-
Fascinating Facts Book of Moon's Mysteries: Mind-Blowing 500+ Moon Mysteries & Discoveries: A Family-Friendly Lunar Guide with Research References (FUN & INTRIGUING FACTS BOOKS SERIES)
- List rank#6
- Price$2.99
- Rating4.0
- Reviews37
-
In The Universe : A Comprehensive Guide
by Mike Feng Zheng
- List rank#7
- Price$2.99
- Rating4.1
- Reviews4
-
Chasing Hubble's Shadows: The Search for Galaxies at the Edge of Time
by Jeff Kanipe
- List rank#8
- Price$0.99
- Rating4.0
- Reviews24
-
Black Holes: Into the Heart of Darkness (The Space Science Series Book 1)
by Marcus Veylan
- List rank#9
- Price$8.99
- Reviews-
-
Cosmology for Everyone: A New Perspective on the Universe
by Matomeru Matome
- List rank#10
- Price$2.99
- Reviews-
FAQ
Is Universe a good niche for Amazon KDP?
Its KDPTop opportunity score is 22/100, which makes it highly competitive. The median best seller has 2 reviews and sells for $4.99.
How many reviews do you need to rank in Universe?
The median best seller has 2 reviews, and 90% of them have fewer than 100.
What do Universe best sellers cost?
The median price is $4.99; half of the best sellers are priced between $2.99 and $7.99.
Can new books break into Universe?
19% 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.