KDP categories · Top KDP authors
Rivers (Earth Sciences, Books): Amazon KDP category data
Amazon Books Best Sellers data for Rivers (Earth Sciences, Books), updated Nov 3, 2026: median price $16.61, median 122 reviews, average rating 4.5 and a KDPTop opportunity score of 31/100 (highly competitive).
| Price range (middle 50%) | $12.31 – $22.06 |
|---|---|
| Average rating | 4.5 |
| New releases (90 days) | 7% |
| Books on the list | 100 |
| Store | Books |
What stands out
- Its median reviews are 8% of the parent category Earth Sciences (1,495), one of the easier corners under it.
- The same niche in Kindle eBooks scores 18, 13 points lower than here.
Top 10 Rivers best sellers
-
Isaac's Storm: A Man, a Time, and the Deadliest Hurricane in History
by Erik Larson
- List rank#1
- Price$15.69
- Rating4.4
- Reviews11,174
-
Cosmos: A Personal Voyage
by Carl Sagan
- List rank#2
- Price$21.66
- Rating4.7
- Reviews8,789
-
Cadillac Desert: The American West and Its Disappearing Water, Revised Edition
by Marc Reisner
- List rank#3
- Price$2.99
- Rating4.6
- Reviews1,441
-
Scientific American September 2026
- List rank#4
- Price$6.99
- Rating4.8
- Reviews13
-
Witness to Water: One Photographer's Mission to Defend the Colorado River
by Pete McBride
- List rank#5
- Price$0.99
- Rating4.6
- Reviews157
-
Scientific American October 2026
- List rank#6
- Price$6.99
- Rating4.2
- Reviews7
-
Scientific American June 2026
- List rank#7
- Price$6.99
- Rating4.4
- Reviews42
-
The Secret World of Weather: How to Read Signs in Every Cloud, Breeze, Hill, Street, Plant, Animal, and Dewdrop (Natural Navigation)
- List rank#8
- Price$17.63
- Rating4.7
- Reviews1,006
-
The Orvis Guide to Beginning Fly Fishing: 101 Tips for the Absolute Beginner
by Tom Rosenbauer
- List rank#9
- Price$9.55
- Rating4.6
- Reviews1,284
-
The Little Red Book of Fly Fishing (Little Books)
by Kirk Deeter
- List rank#10
- Price$13.39
- Rating4.7
- Reviews1,361
Same niche in Kindle eBooks: Rivers
FAQ
Is Rivers a good niche for Amazon KDP?
Its KDPTop opportunity score is 31/100, which makes it highly competitive. The median best seller has 122 reviews and sells for $16.61.
How many reviews do you need to rank in Rivers?
The median best seller has 122 reviews, and 42% of them have fewer than 100.
What do Rivers best sellers cost?
The median price is $16.61; half of the best sellers are priced between $12.31 and $22.06.
Can new books break into Rivers?
7% 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.