KDP categories · Top KDP authors
Relativity (Physics, Books): Amazon KDP category data
Amazon Books Best Sellers data for Relativity (Physics, Books), updated Nov 2, 2026: median price $14.94, median 396 reviews, average rating 4.5 and a KDPTop opportunity score of 29/100 (highly competitive).
| Price range (middle 50%) | $12.79 – $23.83 |
|---|---|
| Average rating | 4.5 |
| New releases (90 days) | 6% |
| Books on the list | 100 |
| Store | Books |
What stands out
- Its median reviews are 21% of the parent category Physics (1,850), one of the easier corners under it.
- Its review barrier is higher than in 73% of Books categories: the median best seller has 396 reviews, so new books need time to build up.
Top 10 Relativity best sellers
-
Baby University Board Book Set: A Science for Toddlers (Gifts for Kids)
by Chris Ferrie
- List rank#1
- Price$29.73
- Rating4.7
- Reviews7,214
-
The Order of Time
- List rank#2
- Price$8.11
- Rating4.4
- Reviews5,998
-
On the Equality of All Things: Lessons on Physics and Philosophy
- List rank#3
- Price$13.09
- Rating4.3
- Reviews75
-
Black Holes: The Key to Understanding the Universe
by Brian Cox
- List rank#4
- Price$1.99
- Rating4.6
- Reviews1,581
-
Einstein: His Life and Universe
- List rank#5
- Price$24.99
- Rating4.6
- Reviews6,327
-
-
Relativity: The Special And The General Theory
- List rank#7
- Price$0.99
- Rating4.3
- Reviews5,802
-
Six Easy Pieces: Essentials of Physics Explained by Its Most Brilliant Teacher
- List rank#8
- Price$10.92
- Rating4.5
- Reviews4,903
-
Scientific American September 2026
- List rank#9
- Price$6.99
- Rating4.8
- Reviews13
-
A Brief History of Time
by Stephen Hawking
- List rank#10
- Price$8.99
- Rating4.6
- Reviews11,625
Same niche in Kindle eBooks: Relativity
FAQ
Is Relativity a good niche for Amazon KDP?
Its KDPTop opportunity score is 29/100, which makes it highly competitive. The median best seller has 396 reviews and sells for $14.94.
How many reviews do you need to rank in Relativity?
The median best seller has 396 reviews, and 20% of them have fewer than 100.
What do Relativity best sellers cost?
The median price is $14.94; half of the best sellers are priced between $12.79 and $23.83.
Can new books break into Relativity?
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.