KDP categories · Top KDP authors
Gravity (Physics, Kindle eBooks): Amazon KDP category data
Amazon Kindle eBooks Best Sellers data for Gravity (Physics, Kindle eBooks), updated Nov 3, 2026: median price $7.89, median 22 reviews, average rating 4.4 and a KDPTop opportunity score of 20/100 (highly competitive).
| Price range (middle 50%) | $4.04 – $11.77 |
|---|---|
| Average rating | 4.4 |
| New releases (90 days) | 16% |
| Books on the list | 100 |
| Store | Kindle eBooks |
What stands out
- Its median reviews are 3% of the parent category Physics (682), one of the easier corners under it.
- 16% of its best sellers came out in the last 90 days, more than in 78% of Kindle eBooks categories: readers here keep buying new titles.
- Its review barrier is lower than in 70% of Kindle eBooks categories: the median best seller has only 22 reviews, so new books can chart with few.
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
-
Scientific American September 2026
- List rank#2
- Price$6.99
- Rating4.8
- Reviews13
-
Scientific American October 2026
- List rank#3
- Price$6.99
- Rating4.2
- Reviews7
-
Scientific American June 2026
- List rank#4
- Price$6.99
- Rating4.4
- Reviews42
-
Scientific American November 2026
- List rank#5
- Price$6.99
- Reviews-
-
Gravity: How the Weakest Force in the Universe Shaped Our Lives
by Brian Clegg
- List rank#6
- Price$3.99
- Rating4.3
- Reviews156
-
Reality Is Not What It Seems: The Journey to Quantum Gravity
- List rank#7
- Price$9.99
- Rating4.5
- Reviews4,766
-
The Universal One
by Walter Russell
- List rank#8
- Price$9.99
- Rating4.6
- Reviews812
-
Scientific American May 2026
- List rank#9
- Price$6.99
- Rating4.0
- Reviews1
-
Scientific American July/August 2026
- List rank#10
- Price$6.99
- Rating4.7
- Reviews8
Same niche in Books: Gravity
FAQ
Is Gravity a good niche for Amazon KDP?
Its KDPTop opportunity score is 20/100, which makes it highly competitive. The median best seller has 22 reviews and sells for $7.89.
How many reviews do you need to rank in Gravity?
The median best seller has 22 reviews, and 63% of them have fewer than 100.
What do Gravity best sellers cost?
The median price is $7.89; half of the best sellers are priced between $4.04 and $11.77.
Can new books break into Gravity?
16% 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.