KDP categories · Top KDP authors
Invertebrates (Zoology, Books): Amazon KDP category data
Amazon Books Best Sellers data for Invertebrates (Zoology, Books), updated Nov 2, 2026: median price $17.54, median 12 reviews, average rating 4.6 and a KDPTop opportunity score of 31/100 (highly competitive).
| Price range (middle 50%) | $13.69 – $28.80 |
|---|---|
| Average rating | 4.6 |
| New releases (90 days) | 13% |
| Books on the list | 100 |
| Store | Books |
What stands out
- Its median reviews are 1% of the parent category Zoology (991), one of the easier corners under it.
- The same niche in Kindle eBooks scores 20, 11 points lower than here.
- Its review barrier is lower than in 80% of Books categories: the median best seller has only 12 reviews, so new books can chart with few.
Top 10 Invertebrates best sellers
-
The Sound of a Wild Snail Eating
by Elisabeth Tova Bailey
- List rank#1
- Price$1.99
- Rating4.5
- Reviews3,106
-
The Soul of an Octopus: A Surprising Exploration into the Wonder of Consciousness
- List rank#2
- Price$10.48
- Rating4.6
- Reviews11,212
-
Scientific American September 2026
- List rank#3
- Price$6.99
- Rating4.8
- Reviews13
-
Scientific American October 2026
- List rank#4
- Price$6.99
- Rating4.2
- Reviews7
-
Scientific American November 2026
- List rank#5
- Price$6.99
- Reviews-
-
The Earth Moved: On the Remarkable Achievements of Earthworms
by Amy Stewart
- List rank#6
- Price$2.99
- Rating4.6
- Reviews400
-
Hidden Creatures: Luscious Leeches, Bashful Botflies, and the Wondrous, History-Shaping World of Parasites
by Dino Martins
- List rank#7
- Price$14.99
- Rating4.8
- Reviews35
-
Parasite Rex: Inside the Bizarre World of Nature's Most Dangerous Creatures
by Carl Zimmer
- List rank#8
- Price$10.80
- Rating4.5
- Reviews737
-
The Trilobite Collector's Guide
by Andy Secher
- List rank#9
- Price$41.07
- Rating5.0
- Reviews46
-
Trilobites A to Z: A Paleozoic Encyclopedia
by Andy Secher
- List rank#10
- Price$95
- Rating4.8
- Reviews11
Same niche in Kindle eBooks: Invertebrates
FAQ
Is Invertebrates a good niche for Amazon KDP?
Its KDPTop opportunity score is 31/100, which makes it highly competitive. The median best seller has 12 reviews and sells for $17.54.
How many reviews do you need to rank in Invertebrates?
The median best seller has 12 reviews, and 72% of them have fewer than 100.
What do Invertebrates best sellers cost?
The median price is $17.54; half of the best sellers are priced between $13.69 and $28.80.
Can new books break into Invertebrates?
13% 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.