KDP categories · Top KDP authors
Viral (Diseases, Books): Amazon KDP category data
Amazon Books Best Sellers data for Viral (Diseases, Books), updated Nov 2, 2026: median price $18.07, median 228 reviews, average rating 4.5 and a KDPTop opportunity score of 28/100 (highly competitive).
| Price range (middle 50%) | $12.04 – $46.68 |
|---|---|
| Average rating | 4.5 |
| New releases (90 days) | 0% |
| Books on the list | 100 |
| Store | Books |
What stands out
- Only 0% of its best sellers are under 90 days old, fewer than in 99% of Books categories: established titles hold the list.
- Its median reviews are 15% of the parent category Diseases (1,499), one of the easier corners under it.
- Prices spread wide: the middle half runs from $12.04 to $46.68, so budget editions and premium or boxed sets sell side by side.
Top 10 Viral best sellers
-
Everything Is Tuberculosis: The History and Persistence of Our Deadliest Infection
by John Green
- List rank#1
- Price$13.50
- Rating4.4
- Reviews11,568
-
Dissolving Illusions
by Suzanne Humphries
- List rank#2
- Price$19.56
- Rating4.8
- Reviews3,521
-
The Hot Zone: The Terrifying True Story of the Origins of the Ebola Virus
- List rank#3
- Price$11.48
- Rating4.6
- Reviews8,343
-
The Ghost Map: The Story of London's Most Terrifying Epidemic--and How It Changed Science, Cities, and the Modern World
- List rank#4
- Price$9.99
- Rating4.4
- Reviews2,583
-
Herbal Antibiotics, 2nd Edition: Natural Alternatives for Treating Drug-resistant Bacteria
by Stephen Harrod Buhner
- List rank#5
- Price$14.82
- Rating4.7
- Reviews2,938
-
No One’s Coming: The Rogue Heroes Our Government Turns to When There’s Nowhere Else to Turn
by Kevin Hazzard
- List rank#6
- Price$24.08
- Rating4.7
- Reviews299
-
Herbal Antibiotics: What BIG Pharma Doesn’t Want You to Know - How to Pick and Use the 45 Most Powerful Herbal Antibiotics for Overcoming Any Ailment
by Mary Jones
- List rank#7
- Price$13.99
- Rating4.6
- Reviews4,582
-
The Great Mortality: An Intimate History of the Black Death, the Most Devastating Plague of All Time
by John Kelly
- List rank#8
- Price$25.89
- Rating4.5
- Reviews1,751
-
The Great Influenza: The Story of the Deadliest Pandemic in History
by John M. Barry
- List rank#9
- Price$9.34
- Rating4.6
- Reviews11,565
-
Rabid: A Cultural History of the World’s Most Diabolical Virus
by Bill Wasik
- List rank#10
- Price$14.99
- Rating4.2
- Reviews1,151
FAQ
Is Viral a good niche for Amazon KDP?
Its KDPTop opportunity score is 28/100, which makes it highly competitive. The median best seller has 228 reviews and sells for $18.07.
How many reviews do you need to rank in Viral?
The median best seller has 228 reviews, and 39% of them have fewer than 100.
What do Viral best sellers cost?
The median price is $18.07; half of the best sellers are priced between $12.04 and $46.68.
Can new books break into Viral?
0% 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.