KDP categories · Top KDP authors
Time (Experiments, Instruments & Measurement, Books): Amazon KDP category data
Amazon Books Best Sellers data for Time (Experiments, Instruments & Measurement, Books), updated Nov 3, 2026: median price $14.21, median 262 reviews, average rating 4.4 and a KDPTop opportunity score of 25/100 (highly competitive).
| Price range (middle 50%) | $10.96 – $21.48 |
|---|---|
| Average rating | 4.4 |
| New releases (90 days) | 4% |
| Books on the list | 100 |
| Store | Books |
What stands out
- Its median reviews are 36% of the parent category Experiments, Instruments & Measurement (734), one of the easier corners under it.
- Only 4% of its best sellers are under 90 days old, fewer than in 82% of Books categories: established titles hold the list.
Top 10 Time best sellers
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![Sapiens [Tenth Anniversary Edition]: A Brief History of Humankind – The #1 New York Times book cover by Yuval Noah Harari](https://images-na.ssl-images-amazon.com/images/I/71kVn6thiBL._AC_UL300_SR300,200_.jpg)
Sapiens [Tenth Anniversary Edition]: A Brief History of Humankind – The #1 New York Times Bestseller Exploring Evolution and Ancient Socieities
- List rank#1
- Price$13.66
- Rating4.6
- Reviews134,001
-
The Order of Time
- List rank#2
- Price$8.11
- Rating4.4
- Reviews5,998
-
Homo Deus: A Brief History of Tomorrow
- List rank#3
- Price$12.24
- Rating4.5
- Reviews38,184
-
On Time: The Physics That Makes the Universe Tick
by Jim Al-Khalili
- List rank#4
- Price$19.79
- Rating4.3
- Reviews43
-
Scientific American September 2026
- List rank#5
- Price$6.99
- Rating4.8
- Reviews13
-
The Fabric of the Cosmos: Space, Time, and the Texture of Reality
by Brian Greene
- List rank#6
- Price$25.59
- Rating4.6
- Reviews2,316
-
Scientific American October 2026
- List rank#7
- Price$6.99
- Rating4.2
- Reviews7
-
The Holographic Universe: The Revolutionary Theory of Reality ― A Science and Philosophy Book on Quantum Physics and the Paranormal
by Michael Talbot
- List rank#8
- Price$14.43
- Rating4.6
- Reviews2,516
-
Until the End of Time: Mind, Matter, and Our Search for Meaning in an Evolving Universe
by Brian Greene
- List rank#9
- Price$14.95
- Rating4.6
- Reviews3,331
-
Scientific American June 2026
- List rank#10
- Price$6.99
- Rating4.4
- Reviews42
Same niche in Kindle eBooks: Time
FAQ
Is Time a good niche for Amazon KDP?
Its KDPTop opportunity score is 25/100, which makes it highly competitive. The median best seller has 262 reviews and sells for $14.21.
How many reviews do you need to rank in Time?
The median best seller has 262 reviews, and 26% of them have fewer than 100.
What do Time best sellers cost?
The median price is $14.21; half of the best sellers are priced between $10.96 and $21.48.
Can new books break into Time?
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.