KDP categories · Top KDP authors
Physical & Theoretical (Chemistry, Kindle eBooks): Amazon KDP category data
Amazon Kindle eBooks Best Sellers data for Physical & Theoretical (Chemistry, Kindle eBooks), updated Nov 2, 2026: median price $9.99, median 8 reviews, average rating 4.5 and a KDPTop opportunity score of 28/100 (highly competitive).
| Price range (middle 50%) | $4.99 – $19.25 |
|---|---|
| Average rating | 4.5 |
| New releases (90 days) | 10% |
| Books on the list | 100 |
| Store | Kindle eBooks |
What stands out
- Its median reviews are 8% of the parent category Chemistry (102), one of the easier corners under it.
- Its review barrier is lower than in 84% of Kindle eBooks categories: the median best seller has only 8 reviews, so new books can chart with few.
- Prices spread wide: the middle half runs from $4.99 to $19.25, so budget editions and premium or boxed sets sell side by side.
Top 10 Physical & Theoretical best sellers
-
Scientific American September 2026
- List rank#1
- Price$6.99
- Rating4.8
- Reviews13
-
Scientific American October 2026
- List rank#2
- Price$6.99
- Rating4.2
- Reviews7
-
Quantum Theory
by Max Planck
- List rank#3
- Price$0.99
- Rating4.5
- Reviews871
-
Scientific American June 2026
- List rank#4
- Price$6.99
- Rating4.4
- Reviews42
-
Scientific American November 2026
- List rank#5
- Price$6.99
- Reviews-
-
It's a Gas: The Sublime and Elusive Elements That Expand Our World – The Secret Lives of Twelve Gases That Shaped Human Civilization
- List rank#6
- Price$9.99
- Rating4.3
- Reviews102
-
The Periodic Kingdom: A Journey Into The Land Of The Chemical Elements (Science Masters Series)
by PW Atkins
- List rank#7
- Price$1.99
- Rating4.0
- Reviews87
-
Scientific American May 2026
- List rank#8
- Price$6.99
- Rating4.0
- Reviews1
-
What If? 10th Anniversary Edition: Serious Scientific Answers to Absurd Hypothetical Questions
- List rank#9
- Price-
- Rating4.6
- Reviews18,803
-
Quantum Mechanics (theoretical physics Book 2)
- List rank#10
- Price$8.99
- Rating5.0
- Reviews1
Same niche in Books: Physical & Theoretical
FAQ
Is Physical & Theoretical a good niche for Amazon KDP?
Its KDPTop opportunity score is 28/100, which makes it highly competitive. The median best seller has 8 reviews and sells for $9.99.
How many reviews do you need to rank in Physical & Theoretical?
The median best seller has 8 reviews, and 76% of them have fewer than 100.
What do Physical & Theoretical best sellers cost?
The median price is $9.99; half of the best sellers are priced between $4.99 and $19.25.
Can new books break into Physical & Theoretical?
10% 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.