KDP categories · Top KDP authors
21st Century (By Century, Kindle eBooks): Amazon KDP category data
Amazon Kindle eBooks Best Sellers data for 21st Century (By Century, Kindle eBooks), updated Nov 2, 2026: median price $10.99, median 13 reviews, average rating 4.2 and a KDPTop opportunity score of 23/100 (highly competitive).
| Price range (middle 50%) | $9.99 – $17.99 |
|---|---|
| Average rating | 4.2 |
| New releases (90 days) | 1% |
| Books on the list | 100 |
| Store | Kindle eBooks |
What stands out
- Its median reviews are 15% of the parent category By Century (86), one of the easier corners under it.
- Only 1% of its best sellers are under 90 days old, fewer than in 97% of Kindle eBooks categories: established titles hold the list.
- At $10.99 its median price beats 90% of Kindle eBooks categories, leaving more margin per copy.
Top 10 21st Century best sellers
-
How to Be Alone: Essays
by Jonathan Franzen
- List rank#1
- Price$2.99
- Rating4.0
- Reviews433
-
The Anatomy of Genres: How Story Forms Explain the Way the World Works
by John Truby
- List rank#2
- Price$12.99
- Rating4.6
- Reviews648
-
New Perspectives on Cormac McCarthy: Encountering The Passenger and Stella Maris
by Jonathan Elmore
- List rank#3
- Price$19.24
- Rating5.0
- Reviews2
-
Black Paper: Writing in a Dark Time (Berlin Family Lectures)
by Teju Cole
- List rank#4
- Price$2.99
- Rating4.6
- Reviews83
-
A Thousand Splendid Suns by Khaled Hosseini (Book Analysis): Detailed Summary, Analysis and Reading Guide (BrightSummaries.com)
- List rank#5
- Price$9.99
- Rating4.0
- Reviews61
-
Bottoms Up and the Devil Laughs: A Journey Through the Deep State
by Kerry Howley
- List rank#6
- Price$9.99
- Rating4.2
- Reviews534
-
Starting from Scratch: The Life-Changing Lessons of Aeneas
by Andrea Marcolongo
- List rank#7
- Price$14.39
- Rating3.9
- Reviews7
-
Never Let Me Go by Kazuo Ishiguro (Book Analysis): Detailed Summary, Analysis and Reading Guide (BrightSummaries.com)
- List rank#8
- Price$9.99
- Rating3.5
- Reviews54
-
All the Light We Cannot See by Anthony Doerr (Book Analysis): Detailed Summary, Analysis and Reading Guide (BrightSummaries.com)
- List rank#9
- Price$9.99
- Rating3.8
- Reviews55
-
After Oscar: The Legacy of a Scandal
by Merlin Holland
- List rank#10
- Price$16.14
- Rating4.6
- Reviews63
FAQ
Is 21st Century a good niche for Amazon KDP?
Its KDPTop opportunity score is 23/100, which makes it highly competitive. The median best seller has 13 reviews and sells for $10.99.
How many reviews do you need to rank in 21st Century?
The median best seller has 13 reviews, and 91% of them have fewer than 100.
What do 21st Century best sellers cost?
The median price is $10.99; half of the best sellers are priced between $9.99 and $17.99.
Can new books break into 21st Century?
1% 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.