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20th Century (United Kingdom, Kindle eBooks): Amazon KDP category data
Amazon Kindle eBooks Best Sellers data for 20th Century (United Kingdom, Kindle eBooks), updated Nov 2, 2026: median price $9.99, median 530 reviews, average rating 4.5 and a KDPTop opportunity score of 24/100 (highly competitive).
| Price range (middle 50%) | $3.99 – $12.99 |
|---|---|
| Average rating | 4.5 |
| New releases (90 days) | 5% |
| Books on the list | 100 |
| Store | Kindle eBooks |
What stands out
- Its review barrier is higher than in 81% of Kindle eBooks categories: the median best seller has 530 reviews, so new books need time to build up.
- Only 5% of its best sellers are under 90 days old, fewer than in 76% 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 20th Century best sellers
-
Say Nothing: A True Story of Murder and Memory in Northern Ireland
- List rank#1
- Price$12.99
- Rating4.6
- Reviews21,401
-
Normandy '44: D-Day and the Epic 77-Day Battle for France
- List rank#2
- Price$11.72
- Rating4.7
- Reviews3,894
-
Diana: Her True Story in Her Own Words
by Andrew Morton
- List rank#3
- Price$11.99
- Rating4.6
- Reviews14,554
-
The War for Middle-earth: J.R.R. Tolkien and C.S. Lewis Confront the Gathering Storm, 1933–1945
- List rank#4
- Price$14.49
- Rating4.8
- Reviews222
-
The Splendid and the Vile: A Saga of Churchill, Family, and Defiance During the Blitz
by Erik Larson
- List rank#5
- Price$14.99
- Rating4.7
- Reviews46,370
-
The Pity of War: Explaining World War I
by Niall Ferguson
- List rank#6
- Price$16.99
- Rating4.4
- Reviews314
-
The Poor Bloody Infantry: 1939-45
- List rank#7
- Price$5.99
- Rating4.4
- Reviews126
-
A Nasty Little War: The Western Intervention into the Russian Civil War
by Anna Reid
- List rank#8
- Price$1.99
- Rating4.2
- Reviews237
-
Lady in Waiting: My Extraordinary Life in the Shadow of the Crown
- List rank#9
- Price$12.99
- Rating4.4
- Reviews28,201
-
Rebel King: The Making of a Monarch
by Tom Bower
- List rank#10
- Price$11.99
- Rating4.0
- Reviews1,974
FAQ
Is 20th Century a good niche for Amazon KDP?
Its KDPTop opportunity score is 24/100, which makes it highly competitive. The median best seller has 530 reviews and sells for $9.99.
How many reviews do you need to rank in 20th Century?
The median best seller has 530 reviews, and 12% of them have fewer than 100.
What do 20th Century best sellers cost?
The median price is $9.99; half of the best sellers are priced between $3.99 and $12.99.
Can new books break into 20th Century?
5% 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.