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Biological & Chemical (Weapons & Warfare, Kindle eBooks): Amazon KDP category data
Amazon Kindle eBooks Best Sellers data for Biological & Chemical (Weapons & Warfare, Kindle eBooks), updated Nov 2, 2026: median price $8.84, median 36 reviews, average rating 4.4 and a KDPTop opportunity score of 19/100 (highly competitive).
| Price range (middle 50%) | $3.99 – $12.99 |
|---|---|
| Average rating | 4.4 |
| New releases (90 days) | 4% |
| Books on the list | 100 |
| Store | Kindle eBooks |
What stands out
- Its median reviews are 6% of the parent category Weapons & Warfare (570), one of the easier corners under it.
- Only 4% of its best sellers are under 90 days old, fewer than in 82% of Kindle eBooks categories: established titles hold the list.
- Prices spread wide: the middle half runs from $3.99 to $12.99, so budget editions and premium or boxed sets sell side by side.
Top 10 Biological & Chemical best sellers
-
The Pentagon's Brain: An Uncensored History of DARPA, America's Top-Secret Military Research Agency
- List rank#1
- Price$12.99
- Rating4.5
- Reviews2,379
-
Biological War: The Sunday Times bestselling non-fiction thriller
- List rank#2
- Price-
- Rating4.6
- Reviews2,490
-
LOST CREED: (Book 4)
by Alex Kava
- List rank#3
- Price$0.99
- Rating4.7
- Reviews5,042
-
The Demon in the Freezer: A True Story
- List rank#4
- Price$6.99
- Rating4.5
- Reviews2,628
-
The Nazi and Japanese Human Experimentation Programmes: Biological War Crimes during WW2
by Tim Heath
- List rank#5
- Price$0.99
- Rating4.1
- Reviews8
-
Armageddon: The Battle for Germany, 1944-45
by Max Hastings
- List rank#6
- Price$11.99
- Rating4.6
- Reviews2,207
-
Origins of Coronavirus: Wuhan, the Secret Research That Sparked the Pandemic, and the Cover-Up of the Century
by Jari Kuikanmäki
- List rank#7
- Price$9.99
- Rating5.0
- Reviews3
-
Biohazard: The Chilling True Story of the Largest Covert Biological Weapons Program in the World--Told from the Inside by the Man Who Ran It
by Ken Alibek
- List rank#8
- Price$13.99
- Rating4.6
- Reviews947
-
The Alchemy of Air: A Jewish Genius, a Doomed Tycoon, and the Scientific Discovery That Fed the World but Fueled the Rise of Hitler
by Thomas Hager
- List rank#9
- Price$11.99
- Rating4.6
- Reviews1,074
-
The Plutonium Files: America's Secret Medical Experiments in the Cold War
by Eileen Welsome
- List rank#10
- Price$8.99
- Rating4.3
- Reviews7
Same niche in Books: Biological & Chemical
FAQ
Is Biological & Chemical a good niche for Amazon KDP?
Its KDPTop opportunity score is 19/100, which makes it highly competitive. The median best seller has 36 reviews and sells for $8.84.
How many reviews do you need to rank in Biological & Chemical?
The median best seller has 36 reviews, and 67% of them have fewer than 100.
What do Biological & Chemical best sellers cost?
The median price is $8.84; half of the best sellers are priced between $3.99 and $12.99.
Can new books break into Biological & Chemical?
4% 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.