KDP categories · Top KDP authors
Bacteriology (Agricultural Sciences, Books): Amazon KDP category data
Amazon Books Best Sellers data for Bacteriology (Agricultural Sciences, Books), updated Nov 3, 2026: median price $18, median 6 reviews, average rating 4.4 and a KDPTop opportunity score of 25/100 (highly competitive).
| Price range (middle 50%) | $13.47 – $32.98 |
|---|---|
| Average rating | 4.4 |
| New releases (90 days) | 17% |
| Books on the list | 100 |
| Store | Books |
What stands out
- Its median reviews are 0% of the parent category Agricultural Sciences (1,284), one of the easier corners under it.
- Its review barrier is lower than in 89% of Books categories: the median best seller has only 6 reviews, so new books can chart with few.
- 17% of its best sellers came out in the last 90 days, more than in 86% of Books categories: readers here keep buying new titles.
Top 10 Bacteriology best sellers
-
Scientific American September 2026
- List rank#1
- Price$6.99
- Rating4.8
- Reviews13
-
Scientific American October 2026
- List rank#2
- Price$6.99
- Rating4.2
- Reviews7
-
Scientific American June 2026
- List rank#3
- Price$6.99
- Rating4.4
- Reviews42
-
Spillover
- List rank#4
- Price$26.95
- Rating4.7
- Reviews4,924
-
Scientific American November 2026
- List rank#5
- Price$6.99
- Reviews-
-
Microbiology Coloring Book: A Fun and Effective Science Workbook with 70 Detailed Illustrations, 45 Fascinating Facts & 70 Tests for Adults, Medical Students, and Beginners
by MedBooks Corner Publishing
- List rank#6
- Price$13.95
- Rating4.0
- Reviews65
-
Biology Made Easy: An Illustrated Study Guide For Students To Easily Learn Cellular & Molecular Biology
by NEDU
- List rank#7
- Price$14.99
- Rating4.4
- Reviews941
-
Ultimate Ciprofloxacin Usage Explained: Información sobre cómo funciona la ciprofloxacina, cuándo se prescribe, riesgos potenciales y uso seguro. (Spanish Edition)
by Russell D. Sifri
- List rank#8
- Price$15.99
- Rating3.5
- Reviews5
-
GUÍA DE AZITROMICINA EXPLICADA (Spanish Edition)
by OTTO MAXWELL
- List rank#9
- Price$21.99
- Rating5.0
- Reviews1
-
Scientific American July/August 2026
- List rank#10
- Price$6.99
- Rating4.7
- Reviews8
Same niche in Kindle eBooks: Biology
FAQ
Is Bacteriology a good niche for Amazon KDP?
Its KDPTop opportunity score is 25/100, which makes it highly competitive. The median best seller has 6 reviews and sells for $18.
How many reviews do you need to rank in Bacteriology?
The median best seller has 6 reviews, and 90% of them have fewer than 100.
What do Bacteriology best sellers cost?
The median price is $18; half of the best sellers are priced between $13.47 and $32.98.
Can new books break into Bacteriology?
17% 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.