KDP categories · Top KDP authors
Rivers (Earth Sciences, Kindle eBooks): Amazon KDP category data
Amazon Kindle eBooks Best Sellers data for Rivers (Earth Sciences, Kindle eBooks), updated Nov 3, 2026: median price $11.59, median 67 reviews, average rating 4.5 and a KDPTop opportunity score of 18/100 (highly competitive).
| Price range (middle 50%) | $8.99 – $14.27 |
|---|---|
| Average rating | 4.5 |
| New releases (90 days) | 4% |
| Books on the list | 100 |
| Store | Kindle eBooks |
What stands out
- Its median reviews are 12% of the parent category Earth Sciences (578), one of the easier corners under it.
- The same niche in Books scores 31, 13 points higher than here; worth checking both.
- At $11.59 its median price beats 93% of Kindle eBooks categories, leaving more margin per copy.
Top 10 Rivers best sellers
-
Cadillac Desert: The American West and Its Disappearing Water, Revised Edition
by Marc Reisner
- List rank#1
- Price$2.99
- Rating4.6
- Reviews1,441
-
Witness to Water: One Photographer's Mission to Defend the Colorado River
by Pete McBride
- List rank#2
- Price$0.99
- Rating4.6
- Reviews157
-
The Great River: The Making and Unmaking of the Mississippi
by Boyce Upholt
- List rank#3
- Price$15.38
- Rating4.2
- Reviews227
-
-
The Unreasonable Virtue of Fly Fishing
- List rank#5
- Price$11.40
- Rating4.4
- Reviews268
-
The Potomac River: A History & Guide
by Garrett Peck
- List rank#6
- Price$11.76
- Rating3.9
- Reviews25
-
The Little Red Book of Fly Fishing (Little Red Books)
by Kirk Deeter
- List rank#7
- Price$9.99
- Rating4.7
- Reviews1,361
-
In Praise of Floods: The Untamed River and the Life It Brings (Yale Agrarian Studies Series)
by James C. Scott
- List rank#8
- Price$12.17
- Rating4.6
- Reviews38
-
Blue Mind: The Surprising Science That Shows How Being Near, In, On, or Under Water Can Make You Happier, Healthier, More Connected, and Better at What You Do
by Wallace J. Nichols
- List rank#9
- Price$11.99
- Rating4.5
- Reviews1,444
-
The Orvis Guide to Beginning Fly Fishing: 101 Tips for the Absolute Beginner (Orvis Guides)
by The Orvis Company
- List rank#10
- Price$8.99
- Rating4.6
- Reviews1,284
Same niche in Books: Rivers
FAQ
Is Rivers a good niche for Amazon KDP?
Its KDPTop opportunity score is 18/100, which makes it highly competitive. The median best seller has 67 reviews and sells for $11.59.
How many reviews do you need to rank in Rivers?
The median best seller has 67 reviews, and 58% of them have fewer than 100.
What do Rivers best sellers cost?
The median price is $11.59; half of the best sellers are priced between $8.99 and $14.27.
Can new books break into Rivers?
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.