KDP categories · Top KDP authors
Reference (Nature & Ecology, Books): Amazon KDP category data
Amazon Books Best Sellers data for Reference (Nature & Ecology, Books), updated Nov 3, 2026: median price $15.14, median 764 reviews, average rating 4.7 and a KDPTop opportunity score of 25/100 (highly competitive).
| Price range (middle 50%) | $11.04 – $21.05 |
|---|---|
| Average rating | 4.7 |
| New releases (90 days) | 2% |
| Books on the list | 100 |
| Store | Books |
What stands out
- Only 2% of its best sellers are under 90 days old, fewer than in 93% of Books categories: established titles hold the list.
- Its median reviews are 45% of the parent category Nature & Ecology (1,709), one of the easier corners under it.
- Its review barrier is higher than in 82% of Books categories: the median best seller has 764 reviews, so new books need time to build up.
Top 10 Reference best sellers
-
The Complete Guide to Edible Wild Plants | book
by U.S. Department of the Army
- List rank#1
- Price$8.75
- Rating4.4
- Reviews3,530
-
Edible Wild Plants: A North American Field Guide to Over 200 Natural Foods
by Thomas Elias
- List rank#2
- Price$23.29
- Rating4.7
- Reviews5,998
-
The Forager's Harvest: A Guide to Identifying, Harvesting, and Preparing Edible Wild Plants
by Samuel Thayer
- List rank#3
- Price$12.15
- Rating4.6
- Reviews6,780
-
Peterson Field Guide To Medicinal Plants & Herbs Of Eastern & Central N. America: Third Edition―A Field Guide to Discovering Nature's Remedies in Eastern and Central North America
by Steven Foster
- List rank#4
- Price$16.03
- Rating4.8
- Reviews3,580
-
Nature Anatomy: The Curious Parts and Pieces of the Natural World
- List rank#5
- Price$9.06
- Rating4.9
- Reviews3,171
-
Southeast Foraging: 120 Wild and Flavorful Edibles from Angelica to Wild Plums (Regional Foraging Series)
by Chris Bennett
- List rank#6
- Price$16.65
- Rating4.7
- Reviews1,198
-
The Dangerous Book for Boys
- List rank#7
- Price$15.54
- Rating4.7
- Reviews7,416
-
Peterson Field Guide To Birds Of Eastern & Central North America, Seventh Ed.: The Classic Birdwatching Guide with Updated Range Maps
- List rank#8
- Price$10.17
- Rating4.8
- Reviews2,199
-
Edible Wild Plants: Eastern/Central North America (Peterson Field Guides) - COVER MAY VARY
by Lee Allen Peterson
- List rank#9
- Price$21.92
- Rating4.7
- Reviews3,576
-
Ocean Anatomy: The Curious Parts & Pieces of the World under the Sea
- List rank#10
- Price$13.32
- Rating4.9
- Reviews3,025
FAQ
Is Reference a good niche for Amazon KDP?
Its KDPTop opportunity score is 25/100, which makes it highly competitive. The median best seller has 764 reviews and sells for $15.14.
How many reviews do you need to rank in Reference?
The median best seller has 764 reviews, and 8% of them have fewer than 100.
What do Reference best sellers cost?
The median price is $15.14; half of the best sellers are priced between $11.04 and $21.05.
Can new books break into Reference?
2% 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.