KDP categories · Top KDP authors
Gravity (Physics, Books): Amazon KDP category data
Amazon Books Best Sellers data for Gravity (Physics, Books), updated Nov 3, 2026: median price $17.30, median 40 reviews, average rating 4.5 and a KDPTop opportunity score of 27/100 (highly competitive).
| Price range (middle 50%) | $13.49 – $21.49 |
|---|---|
| Average rating | 4.5 |
| New releases (90 days) | 12% |
| Books on the list | 100 |
| Store | Books |
What stands out
- Its median reviews are 2% of the parent category Physics (1,850), one of the easier corners under it.
Top 10 Gravity best sellers
-
Black Holes: The Key to Understanding the Universe
by Brian Cox
- List rank#1
- Price$1.99
- Rating4.6
- Reviews1,581
-
Reality Is Not What It Seems: The Journey to Quantum Gravity
- List rank#2
- Price$10.48
- Rating4.5
- Reviews4,766
-
Scientific American September 2026
- List rank#3
- Price$6.99
- Rating4.8
- Reviews13
-
Something Deeply Hidden: Quantum Worlds and the Emergence of Spacetime
by Sean Carroll
- List rank#4
- Price$17.69
- Rating4.6
- Reviews3,482
-
Scientific American October 2026
- List rank#5
- Price$6.99
- Rating4.2
- Reviews7
-
Scientific American June 2026
- List rank#6
- Price$6.99
- Rating4.4
- Reviews42
-
The Biggest Ideas in the Universe: Space, Time, and Motion
by Sean Carroll
- List rank#7
- Price$14.88
- Rating4.5
- Reviews1,368
-
Scientific American November 2026
- List rank#8
- Price$6.99
- Reviews-
-
The Universal One
by Walter Russell
- List rank#9
- Price$15.14
- Rating4.6
- Reviews812
-
The Elegant Universe: Superstrings, Hidden Dimensions, and the Quest for the Ultimate Theory
by Brian Greene
- List rank#10
- Price$17.30
- Rating4.6
- Reviews4,240
Same niche in Kindle eBooks: Gravity
FAQ
Is Gravity a good niche for Amazon KDP?
Its KDPTop opportunity score is 27/100, which makes it highly competitive. The median best seller has 40 reviews and sells for $17.30.
How many reviews do you need to rank in Gravity?
The median best seller has 40 reviews, and 62% of them have fewer than 100.
What do Gravity best sellers cost?
The median price is $17.30; half of the best sellers are priced between $13.49 and $21.49.
Can new books break into Gravity?
12% 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.