KDP categories · Top KDP authors
General & Reference (Chemistry, Books): Amazon KDP category data
Amazon Books Best Sellers data for General & Reference (Chemistry, Books), updated Nov 2, 2026: median price $18.60, median 315 reviews, average rating 4.5 and a KDPTop opportunity score of 29/100 (highly competitive).
| Price range (middle 50%) | $11.83 – $24.05 |
|---|---|
| Average rating | 4.5 |
| New releases (90 days) | 7% |
| Books on the list | 100 |
| Store | Books |
What stands out
- Its review barrier is higher than in 70% of Books categories: the median best seller has 315 reviews, so new books need time to build up.
Top 10 General & Reference best sellers
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The Disappearing Spoon: And Other True Tales of Madness, Love, and the History of the World from the Periodic Table of the Elements
by Sam Kean
- List rank#1
- Price$12.45
- Rating4.5
- Reviews3,499
-
Elements: A Visual Exploration of Every Known Atom in the Universe (RP Minis)
- List rank#2
- Price$10.61
- Rating4.8
- Reviews3,003
-
-
Scientific American September 2026
- List rank#4
- Price$6.99
- Rating4.8
- Reviews13
-
How to Catch a Killer: A History of the Forensic Science Toolkit
by Brandy Schillace
- List rank#5
- Price$13.78
- Reviews-
-
AP Chemistry Premium, 2027: Prep Book with 6 Practice Tests + Comprehensive Review + Online Practice (Barron's AP Prep)
by Neil D. Jespersen Ph.D.
- List rank#6
- Price$19.99
- Rating4.5
- Reviews79
-
Scientific American October 2026
- List rank#7
- Price$6.99
- Rating4.2
- Reviews7
-
Chemistry: a QuickStudy Laminated Reference Guide (QuickStudy Academic)
by Mark Jackson PhD
- List rank#8
- Price$6.49
- Rating4.6
- Reviews3,153
-
Chemistry Made Easy: An Illustrated Study Guide For Students To Easily Learn Chemistry
by NEDU
- List rank#9
- Price$10.21
- Rating4.4
- Reviews1,563
-
Princeton Review AP Chemistry Premium Prep, 28th Edition: 7 Practice Tests + Digital Practice Online + Content Review (College Test Preparation)
- List rank#10
- Price$20.99
- Rating5.0
- Reviews9
Same niche in Kindle eBooks: General & Reference
FAQ
Is General & Reference a good niche for Amazon KDP?
Its KDPTop opportunity score is 29/100, which makes it highly competitive. The median best seller has 315 reviews and sells for $18.60.
How many reviews do you need to rank in General & Reference?
The median best seller has 315 reviews, and 32% of them have fewer than 100.
What do General & Reference best sellers cost?
The median price is $18.60; half of the best sellers are priced between $11.83 and $24.05.
Can new books break into General & Reference?
7% 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.