KDP categories · Top KDP authors
Invertebrates (Zoology, Kindle eBooks): Amazon KDP category data
Amazon Kindle eBooks Best Sellers data for Invertebrates (Zoology, Kindle eBooks), updated Nov 2, 2026: median price $7.99, median 20 reviews, average rating 4.6 and a KDPTop opportunity score of 20/100 (highly competitive).
| Price range (middle 50%) | $4.99 – $14.99 |
|---|---|
| Average rating | 4.6 |
| New releases (90 days) | 16% |
| Books on the list | 100 |
| Store | Kindle eBooks |
What stands out
- Its median reviews are 7% of the parent category Zoology (271), one of the easier corners under it.
- The same niche in Books scores 31, 11 points higher than here; worth checking both.
- 16% of its best sellers came out in the last 90 days, more than in 78% of Kindle eBooks categories: readers here keep buying new titles.
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
-
Scientific American September 2026
- List rank#2
- Price$6.99
- Rating4.8
- Reviews13
-
Scientific American October 2026
- List rank#3
- Price$6.99
- Rating4.2
- Reviews7
-
Scientific American June 2026
- List rank#4
- Price$6.99
- Rating4.4
- Reviews42
-
Scientific American November 2026
- List rank#5
- Price$6.99
- Reviews-
-
The Soul of an Octopus: A Surprising Exploration into the Wonder of Consciousness
- List rank#6
- Price$13.99
- Rating4.6
- Reviews11,212
-
Scientific American May 2026
- List rank#7
- Price$6.99
- Rating4.0
- Reviews1
-
Scientific American July/August 2026
- List rank#8
- Price$6.99
- Rating4.7
- Reviews8
-
Scientific American 14th April 2026
- List rank#9
- Price$6.99
- Rating4.5
- Reviews11
-
The Earth Moved: On the Remarkable Achievements of Earthworms
by Amy Stewart
- List rank#10
- Price$2.99
- Rating4.6
- Reviews400
Same niche in Books: Invertebrates
FAQ
Is Invertebrates a good niche for Amazon KDP?
Its KDPTop opportunity score is 20/100, which makes it highly competitive. The median best seller has 20 reviews and sells for $7.99.
How many reviews do you need to rank in Invertebrates?
The median best seller has 20 reviews, and 79% of them have fewer than 100.
What do Invertebrates best sellers cost?
The median price is $7.99; half of the best sellers are priced between $4.99 and $14.99.
Can new books break into Invertebrates?
16% 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.