KDP categories · Top KDP authors
Relativity (Physics, Kindle eBooks): Amazon KDP category data
Amazon Kindle eBooks Best Sellers data for Relativity (Physics, Kindle eBooks), updated Nov 2, 2026: median price $6.99, median 111 reviews, average rating 4.5 and a KDPTop opportunity score of 21/100 (highly competitive).
| Price range (middle 50%) | $4.99 – $10.93 |
|---|---|
| Average rating | 4.5 |
| New releases (90 days) | 9% |
| Books on the list | 100 |
| Store | Kindle eBooks |
What stands out
- Its median reviews are 16% of the parent category Physics (682), one of the easier corners under it.
Top 10 Relativity best sellers
-
Black Holes: The Key to Understanding the Universe
by Brian Cox
- List rank#1
- Price$1.99
- Rating4.6
- Reviews1,581
-
-
On the Equality of All Things: Lessons on Physics and Philosophy
- List rank#3
- Price$12.99
- Rating4.3
- Reviews75
-
Scientific American September 2026
- List rank#4
- Price$6.99
- Rating4.8
- Reviews13
-
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
-
Relativity: The Special And The General Theory
- List rank#7
- Price$0.99
- Rating4.3
- Reviews5,802
-
The Order of Time
- List rank#8
- Price$9.99
- Rating4.4
- Reviews5,998
-
Quantum Physics for Beginners: The Non-Scientist’s Guide to the Big Ideas of Quantum Mechanics, with Key Principles, Major Theories, and Experiments Simplified
by Pantheon Space Academy
- List rank#9
- Price$4.99
- Rating4.3
- Reviews964
-
Scientific American November 2026
- List rank#10
- Price$6.99
- Reviews-
Same niche in Books: Relativity
FAQ
Is Relativity a good niche for Amazon KDP?
Its KDPTop opportunity score is 21/100, which makes it highly competitive. The median best seller has 111 reviews and sells for $6.99.
How many reviews do you need to rank in Relativity?
The median best seller has 111 reviews, and 48% of them have fewer than 100.
What do Relativity best sellers cost?
The median price is $6.99; half of the best sellers are priced between $4.99 and $10.93.
Can new books break into Relativity?
9% 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.