KDP categories · Top KDP authors
Entropy: Amazon KDP category data
Amazon Books Best Sellers data for Entropy, updated Nov 2, 2026: median price $36.03, median 8 reviews, average rating 4.4 and a KDPTop opportunity score of 26/100 (highly competitive).
| Price range (middle 50%) | $20.79 – $68.64 |
|---|---|
| Average rating | 4.4 |
| New releases (90 days) | 8% |
| Books on the list | 100 |
| Store | Books |
What stands out
- Its median reviews are 0% of the parent category Physics (1,850), one of the easier corners under it.
- At $36.03 its median price beats 92% of Books categories, leaving more margin per copy.
- Its review barrier is lower than in 85% of Books categories: the median best seller has only 8 reviews, so new books can chart with few.
Top 10 Entropy best sellers
-
The Order of Time
- List rank#1
- Price$8.11
- Rating4.4
- Reviews5,998
-
The Fabric of the Cosmos: Space, Time, and the Texture of Reality
by Brian Greene
- List rank#2
- Price$11.48
- Rating4.6
- Reviews2,316
-
On Time: The Physics That Makes the Universe Tick
by Jim Al-Khalili
- List rank#3
- Price$29.76
- Rating4.3
- Reviews43
-
Exiled Fleet (The Divide Series, 2)
by J S Dewes
- List rank#4
- Price$11.92
- Rating4.5
- Reviews3,136
-
The Cosmic Hologram: In-formation at the Center of Creation
by Jude Currivan
- List rank#5
- Price$16.95
- Rating4.4
- Reviews257
-
Thermodynamics (Dover Books on Physics)
by Enrico Fermi
- List rank#6
- Price$13.24
- Rating4.5
- Reviews432
-
Thermodynamics in Plain English for Absolute Beginners: Heat, Energy, and the Hidden Rules that Shape the Physical World (Understanding Thermodynamics)
- List rank#7
- Price$21.49
- Rating4.7
- Reviews22
-
The Mathematical Theory of Communication
by Claude E Shannon
- List rank#8
- Price$55
- Rating4.7
- Reviews265
-
Time's Second Arrow: Evolution, Order, and a New Law of Nature
by Robert M. Hazen
- List rank#9
- Price$23.94
- Rating4.2
- Reviews50
-
Battle of the Big Bang: The New Tales of Our Cosmic Origins
by Niayesh Afshordi
- List rank#10
- Price$29.40
- Rating4.3
- Reviews150
FAQ
Is Entropy a good niche for Amazon KDP?
Its KDPTop opportunity score is 26/100, which makes it highly competitive. The median best seller has 8 reviews and sells for $36.03.
How many reviews do you need to rank in Entropy?
The median best seller has 8 reviews, and 81% of them have fewer than 100.
What do Entropy best sellers cost?
The median price is $36.03; half of the best sellers are priced between $20.79 and $68.64.
Can new books break into Entropy?
8% 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.